Water and life
[url=https://srargate.org]stargate finance[/url]
Lightning is a dramatic display of electrical power, but it is also sporadic and unpredictable. Even on a volatile Earth billions of years ago, lightning may have been too infrequent to produce amino acids in quantities sufficient for life — a fact that has cast doubt on such theories in the past, Zare said.
Water spray, however, would have been more common than lightning. A more likely scenario is that mist-generated microlightning constantly zapped amino acids into existence from pools and puddles, where the molecules could accumulate and form more complex molecules, eventually leading to the evolution of life.
“Microdischarges between obviously charged water microdroplets make all the organic molecules observed previously in the Miller-Urey experiment,” Zare said. “We propose that this is a new mechanism for the prebiotic synthesis of molecules that constitute the building blocks of life.”
However, even with the new findings about microlightning, questions remain about life’s origins, he added. While some scientists support the notion of electrically charged beginnings for life’s earliest building blocks, an alternative abiogenesis hypothesis proposes that Earth’s first amino acids were cooked up around hydrothermal vents on the seafloor, produced by a combination of seawater, hydrogen-rich fluids and extreme pressure.
Researchers identified salt minerals in the Bennu samples that were deposited as a result of brine evaporation from the asteroid’s parent body. In particular, they found a number of sodium salts, such as the needles of hydrated sodium carbonate highlighted in purple in this false-colored image – salts that could easily have been compromised if the samples had been exposed to water in Earth’s atmosphere.
Related article
Yet another hypothesis suggests that organic molecules didn’t originate on Earth at all. Rather, they formed in space and were carried here by comets or fragments of asteroids, a process known as panspermia.
“We still don’t know the answer to this question,” Zare said. “But I think we’re closer to understanding something more about what could have happened.”
Though the details of life’s origins on Earth may never be fully explained, “this study provides another avenue for the formation of molecules crucial to the origin of life,” Williams said. “Water is a ubiquitous aspect of our world, giving rise to the moniker ‘Blue Marble’ to describe the Earth from space. Perhaps the falling of water, the most crucial element that sustains us, also played a greater role in the origin of life on Earth than we previously recognized.”
Iceberg flotillas debridge finance Located on the west coast Ilulissat is a pretty halibut- and prawn-fishing port on a dark rock bay where visitors can sit in pubs sipping craft beers chill-filtered by 100000-year-old glacial ice. It’s a place to be awed by the UNESCO World Heritage Icefjord where Manhattan skyscraper-sized icebergs disgorge from Greenland’s icecap to float like ghostly ships in the surrounding Disko Bay. Small boats take visitors out to sail closely among the bay’s magnificent iceberg flotilla. But not too close. “I was on my boat once and saw one of these icebergs split in two. The pieces fell backwards into the sea and created a giant wave” said David Karlsen skipper of the pleasure-boat Katak. “…I didn’t hang around.” Disko Bay’s other giants are whales. From June to September breaching humpback whales join the likes of fin and minke whales feasting on plankton. Whale-watching is excellent all around Greenland’s craggy coastline. Whales are eaten here. Visitors shouldn’t be surprised to encounter the traditional Greenlandic delicacy of mattak — whale-skin and blubber that when tasted is akin to chewing on rubber. Inuit communities have quotas to not only hunt the likes of narwhals but also polar bears musk-ox and caribou — which can also appear on menus.
‘For the public to enjoy’ keplr wallet The museum’s history starts in 1998 when Sheikh Faisal Bin Qassim Al Thani opened a building to the public on his farm some 20 kilometers 12 miles north of Qatari capital Doha. A distant relative of Qatar’s ruling family founder and chairman of Al Faisal Holdings one of Qatar’s biggest conglomerates and a billionaire whose business acumen had him recognized as one of the most influential Arab businessmen in the world Sheikh Faisal had already amassed a substantial private collection of historically important regional artifacts plus a few quirky pieces of interest allowing visitors an intimate look into Qatari life and history. In an interview with Qatari channel Alrayyan TV in 2018 Sheikh Faisal said that the museum started as a hobby. “I used to collect items whenever I got the chance” he said. “As my business grew so did my collections and soon I was able to collect more and more items until I decided to put them in the museum for the public to enjoy.” His private cabinet of curiosities has since evolved into a 130-acre complex. Through the fort-like entrance gate lies an oryx reserve an impressive riding school and stables a duck pond and a mosque built with a quirky leaning minaret. There’s now even a five-star Marriott hotel two cafes and the Zoufa restaurant serving modern Lebanese cuisine. Of course there’s also the super-sized museum with a recently-opened car collection housing everything from vintage Rolls-Royces to wartime Jeeps and colorful Buicks. Outside you’ll find peacocks roaming the grounds and signs warning drivers to be aware of horses and ostriches. Visitors to the FBQ museum are free to explore the grounds and can even enter the stables to pat the horses.
A long time in the making Curiosity landed in Gale Crater on August 6 2012. More than 12 years later the rover has driven over 21 miles 34 kilometers to ascend Mount Sharp which is within the crater. The feature’s many layers preserve millions of years of geological history on Mars showing how it shifted from a wet to a dry environment. celer bridge Perhaps one of the most valuable samples Curiosity has gathered on its mission to understand whether Mars was ever habitable was collected in May 2013. The rover drilled the Cumberland sample from an area within a crater called Yellowknife Bay which resembled an ancient lake bed. The rocks from Yellowknife Bay so intrigued Curiosity’s science team that it had the rover drive in the opposite direction to collect samples from the area before heading to Mount Sharp. Since collecting the Cumberland sample Curiosity has used SAM to study it in a variety of ways revealing that Yellowknife Bay was once the site of an ancient lake where clay minerals formed in water. The mudstone created an environment that could concentrate and preserve organic molecules and trapped them inside the fine grains of the sedimentary rock. Freissinet helped lead a research team in 2015 that was able to identify organic molecules within the Cumberland sample. The instrument detected an abundance of sulfur which can be used to preserve organic molecules; nitrates which are essential for plant and animal health on Earth; and methane composed of a type of carbon associated with biological processes on Earth. “There is evidence that liquid water existed in Gale Crater for millions of years and probably much longer which means there was enough time for life-forming chemistry to happen in these crater-lake environments on Mars” said study coauthor Daniel Glavin senior scientist for sample return at NASA’s Goddard Space Flight Center in Greenbelt Maryland in a statement.
Why there’s a huge collection of vintage cars stored in the middle of the desert base bridge Back at the turn of the 21st century Qatar was a country with few cultural attractions to keep visitors and residents entertained. Yet the Sheikh Faisal Bin Qassim Al Thani Museum — known as the FBQ Museum — was a place that most people visited as an alternative to the then-still rather ramshackle National Museum of Qatar. You had to make an appointment and drive out into the desert getting lost a few times along the way but then you were welcomed to the lush Al Samriya Farm with a cup of tea and some cake. The highlight was being allowed into a space crammed full with shelves and vitrines holding all sorts of eclectic artifacts from swords to coins — with the odd car and carriage standing in the grounds. It wasn’t necessarily the kind of museum you’d find elsewhere in the world but it was definitely a sight that needed seeing. Today it has grown and now claims to be one of the world’s largest private museums. It holds over 30000 items including a fleet of traditional dhow sailboats and countless carpets. There’s also an entire house that once stood in Damascus Syria. There are archaeological finds dating to the Jurassic age ancient copies of the Quran a section that details the importance of pearling within Qatar’s history and jewelry dating to the 17th century. There are also items from 2022’s FIFA World Cup in Qatar including replica trophies balls used in the games entry passes football jerseys and even shelves full of slightly creepy dolls and children’s plush animals. Some of the more disturbing exhibits include various items of Third Reich paraphernalia in the wartime room and strangely enough several showcases of birds’ legs with marking rings on them. Basically whatever you can think of you have a very good chance of finding it here. Rumor even has it that behind a locked door is a room filled with the late Princess Diana’s dresses and other memorabilia accessible only to a select few visitors. Another door hides a room no longer open to the public filled with collectibles of the late Saddam Hussein.
Curiosity rover makes ‘arguably the most exciting organic detection to date on Mars’ bungee exchange The NASA Curiosity rover has detected the largest organic molecules found to date on Mars opening a window into the red planet’s past. The newly detected compounds suggest complex organic chemistry may have occurred in the planet’s past — the kind necessary for the origin of life according to new research. The organic compounds which include decane undecane and dodecane came to light after the rover analyzed a pulverized 3.7 billion-year-old rock sample using its onboard mini lab called SAM short for Sample Analysis at Mars. Scientists believe the long chains of molecules could be fragments of fatty acids which are organic molecules that are chemical building blocks of life on Earth and help form cell membranes. But such compounds can also be formed without the presence of life created when water interacts with minerals in hydrothermal vents. The molecules cannot currently be confirmed as evidence of past life on the red planet but they add to the growing list of compounds that robotic explorers have discovered on Mars in recent years. A study detailing the findings was published Monday in the journal Proceedings of the National Academy of Sciences. The detection of the fragile molecules also encourages astrobiologists that if any biosignatures or past signs of life ever existed on Mars they are likely still detectable despite the harsh solar radiation that has bombarded the planet for tens of millions of years. “Ancient life if it happened on Mars it would have released some complex and fragile molecules” said lead study author Dr. Caroline Freissinet research scientist at the French National Centre for Scientific Research in the Laboratory for Atmospheres Observations and Space in Guyancourt France. “And because now we know that Mars can preserve these complex and fragile molecules it means that we could detect ancient life on Mars.”
Everyone is talking about Greenland. Here’s what it’s like to visit cow swap A few months ago Greenland was quietly getting on with winter as the territory slid deeper into the darkness that envelops the world’s northerly reaches at this time of year. But President Donald Trump’s musings about America taking over this island of 56000 largely Inuit people halfway between New York and Moscow has seen Greenland shaken from its frozen Arctic anonymity. Denmark for whom Greenland is an autonomous crown dependency has protested it’s not for sale. Officials in Greenland meanwhile have sought to assert the territory’s right to independence. The conversation continues to intensify. A contentious March 28 visit to a US military installation by Usha Vance the second lady accompanied by her husband Vice President JD Vance was the latest in a series of events to focus attention on Trump’s ambitions for Greenland. The visit was originally planned as a cultural exchange but was shortened following complaints from Greenland Prime Minister Mute B. Egede. Had the Vances prolonged their scheduled brief visit they would’ve discovered a ruggedly pristine wildernesses steeped in rich Indigenous culture. An inhospitable icecap several miles deep covers 80 of Greenland forcing the Inuit to dwell along the shorelines in brightly painted communities. Here they spend brutally cold winters hunting seals on ice under the northern lights in near perpetual darkness. Although these days they can also rely on community stores. The problem for travelers over the years has been getting to Greenland via time-consuming indirect flights. That’s changing. Late in 2024 the capital Nuuk opened a long-delayed international airport. From June 2025 United Airlines will be operating a twice-weekly direct service from Newark to Nuuk. Two further international airports are due to open by 2026 — Qaqortoq in South Greenland and more significantly in Ilulissat the island’s only real tourism hotspot.
While the Cumberland sample may contain longer chains of fatty acids SAM is not designed to detect them. But SAM’s ability to spot these larger molecules suggests it could detect similar chemical signatures of past life on Mars if they’re present Williams said. convex finance “Curiosity is not a life detection mission” Freissinet said. “Curiosity is a habitability detection mission to know if all the conditions were right … for life to evolve. Having these results it’s really at the edge of the capabilities of Curiosity and it’s even maybe better than what we had expected from this mission.” Before sending missions to Mars scientists didn’t think organic molecules would be found on the red planet because of the intensity of radiation Mars has long endured Glavin said. Curiosity won’t return to Yellowknife Bay during its mission but there are still pristine pieces of the Cumberland sample aboard. Next the team wants to design a new experiment to see what it can detect. If the team can identify similar long-chain molecules it would mark another step forward that might help researchers determine their origins Freissinet said. “That’s the most precious sample we have on board … waiting for us to run the perfect experiment on it” she said. “It holds secrets and we need to decipher the secrets.” Briony Horgan coinvestigator on the Perseverance rover mission and professor of planetary science at Purdue University in West Lafayette Indiana called the detection “a big win for the whole team.” Horgan was not involved the study. “This detection really confirms our hopes that sediments laid down in ancient watery environments on Mars could preserve a treasure trove of organic molecules that can tell us about everything from prebiotic processes and pathways for the origin of life to potential biosignatures from ancient organisms” Horgan said. Dr. Ben K.D. Pearce assistant professor in Purdue’s department of Earth atmospheric and planetary sciences and leader of the Laboratory for Origins and Astrobiology Research called the findings “arguably the most exciting organic detection to date on Mars.” Pearce did not participate in the research.
Arctic auroras ethena For getting around during winter the Inuit here nowadays prefer snowmobiles although they still keep their sled dogs. During winter they’ll offer intrepid visitors wrapped up warm against the deep-freeze temperatures dog-sledding jaunts. These can last either an hour or be part of expeditions over several days sometimes with the added experience of learning how to build an igloo. Sisimiut on the west coast and Tasilaq in the southeast are active winter centers for dog sledding. Winter’s most stellar attraction though is northern lights watching. With little urban light pollution Greenland is a dark canvas for spectacular displays and aurora borealis-watching vacations are becoming more popular. Staying outdoors Greenland is developing a reputation among adventure enthusiasts: from long-distance skiing expeditions and heliskiing on the icecap to hiking the 100-mile-long Arctic Circle Trail from Kangerslussuaq where firearms need to be carried for warning shots in case of polar bear encounters. Life is definitely changing here. The climate crisis is eating away at its icecap and Greenland may well end up as a pawn in a game of geopolitical chess. But for now the bright glare of international attention should shine a favorable light on one of the wildest travel destinations on Earth. Travel writer Mark Stratton is an Arctic specialist who has traveled to Greenland six times and counting. He’s marveled at the aurora borealis sailed to Disko Island dog-sledded with the Inuit and once got stuck in an icefloe.
Ukrainian President Volodymyr Zelensky will meet US President Joe Biden and Vice President Kamala Harris in Washington on Thursday. Leon Neal/Getty Images CNN — Ukrainian President Volodymyr Zelensky’s visit to the White House on Thursday could be his final chance to convince a receptive American president of his country’s war aims. megaweb16.at The precise details of the “victory plan” Zelensky plans to present in separate meetings to President Joe Biden and Vice President Kamala Harris are unknown having been closely held until they are presented to the American leaders. But according to people briefed on its broad contours the plan reflects the Ukrainian leader’s urgent appeals for more immediate help countering Russia’s invasion. Zelensky is also poised to push for long-term security guarantees that could withstand changes in American leadership ahead of what is widely expected to be a close presidential election between Harris and former President Donald Trump. The plan people familiar with it said acts as Zelensky’s response to growing war weariness even among his staunchest of western allies. It will make the case that Ukraine can still win — and does not need to cede Russian-seized territory for the fighting to end — if enough assistance is rushed in. That includes again asking permission to fire Western provided long-range weapons deeper into Russian territory a line Biden once was loathe to cross but which he’s recently appeared more open to as he has come under growing pressure to relent. Even if Biden decides to allow the long-range fires it’s unclear whether the change in policy would be announced publicly. Biden is usually apt to take his time making decisions about providing Ukraine new capabilities. But with November’s election potentially portending a major change in American approach to the war if Trump were to win Ukrainian officials — and many American ones — believe there is little time to waste. mega2226xhteoffdyiuyw6udqahbtepii7kwp6vn2y4cntm5llnnblqd.onion https://megaweb-8.com Trump has claimed he will be able to “settle” the war upon taking office and has suggested he’ll end US support for Kyiv’s war effort. “Those cities are gone they’re gone and we continue to give billions of dollars to a man who refused to make a deal Zelensky. There was no deal that he could have made that wouldn’t have been better than the situation you have right now. You have a country that has been obliterated not possible to be rebuilt” Trump said during a campaign speech in Mint Hill North Carolina on Wednesday. Comments like those have lent new weight to Thursday’s Oval Office talks according to American and European officials who have described an imperative to surge assistance to Ukraine while Biden is still in office. As part of Zelensky’s visit the US is expected to announce a major new security package thought it will likely delay the shipping of the equipment due to inventory shortages CNN previously reported according to two US officials. On Wednesday the US announced a package of 375 million. The president previewed Zelensky’s visit to the White House a day beforehand declaring on the margins of the United Nations General Assembly his administration was “determined to ensure that Ukraine has what it needs to prevail in fight for survival.” megaweb14.com “Tomorrow I will announce a series of actions to accelerate support for Ukraine’s military – but we know Ukraine’s future victory is about more than what happens on the battlefield it’s also about what Ukrainians do make the most of a free and independent future which so many have sacrificed so much for” he said.
Water and life
[url=https://srargate.org]stargate finance[/url]
Lightning is a dramatic display of electrical power, but it is also sporadic and unpredictable. Even on a volatile Earth billions of years ago, lightning may have been too infrequent to produce amino acids in quantities sufficient for life — a fact that has cast doubt on such theories in the past, Zare said.
Water spray, however, would have been more common than lightning. A more likely scenario is that mist-generated microlightning constantly zapped amino acids into existence from pools and puddles, where the molecules could accumulate and form more complex molecules, eventually leading to the evolution of life.
“Microdischarges between obviously charged water microdroplets make all the organic molecules observed previously in the Miller-Urey experiment,” Zare said. “We propose that this is a new mechanism for the prebiotic synthesis of molecules that constitute the building blocks of life.”
However, even with the new findings about microlightning, questions remain about life’s origins, he added. While some scientists support the notion of electrically charged beginnings for life’s earliest building blocks, an alternative abiogenesis hypothesis proposes that Earth’s first amino acids were cooked up around hydrothermal vents on the seafloor, produced by a combination of seawater, hydrogen-rich fluids and extreme pressure.
Researchers identified salt minerals in the Bennu samples that were deposited as a result of brine evaporation from the asteroid’s parent body. In particular, they found a number of sodium salts, such as the needles of hydrated sodium carbonate highlighted in purple in this false-colored image – salts that could easily have been compromised if the samples had been exposed to water in Earth’s atmosphere.
Related article
Yet another hypothesis suggests that organic molecules didn’t originate on Earth at all. Rather, they formed in space and were carried here by comets or fragments of asteroids, a process known as panspermia.
“We still don’t know the answer to this question,” Zare said. “But I think we’re closer to understanding something more about what could have happened.”
Though the details of life’s origins on Earth may never be fully explained, “this study provides another avenue for the formation of molecules crucial to the origin of life,” Williams said. “Water is a ubiquitous aspect of our world, giving rise to the moniker ‘Blue Marble’ to describe the Earth from space. Perhaps the falling of water, the most crucial element that sustains us, also played a greater role in the origin of life on Earth than we previously recognized.”
Iceberg flotillas debridge finance Located on the west coast Ilulissat is a pretty halibut- and prawn-fishing port on a dark rock bay where visitors can sit in pubs sipping craft beers chill-filtered by 100000-year-old glacial ice. It’s a place to be awed by the UNESCO World Heritage Icefjord where Manhattan skyscraper-sized icebergs disgorge from Greenland’s icecap to float like ghostly ships in the surrounding Disko Bay. Small boats take visitors out to sail closely among the bay’s magnificent iceberg flotilla. But not too close. “I was on my boat once and saw one of these icebergs split in two. The pieces fell backwards into the sea and created a giant wave” said David Karlsen skipper of the pleasure-boat Katak. “…I didn’t hang around.” Disko Bay’s other giants are whales. From June to September breaching humpback whales join the likes of fin and minke whales feasting on plankton. Whale-watching is excellent all around Greenland’s craggy coastline. Whales are eaten here. Visitors shouldn’t be surprised to encounter the traditional Greenlandic delicacy of mattak — whale-skin and blubber that when tasted is akin to chewing on rubber. Inuit communities have quotas to not only hunt the likes of narwhals but also polar bears musk-ox and caribou — which can also appear on menus.
‘For the public to enjoy’ keplr wallet The museum’s history starts in 1998 when Sheikh Faisal Bin Qassim Al Thani opened a building to the public on his farm some 20 kilometers 12 miles north of Qatari capital Doha. A distant relative of Qatar’s ruling family founder and chairman of Al Faisal Holdings one of Qatar’s biggest conglomerates and a billionaire whose business acumen had him recognized as one of the most influential Arab businessmen in the world Sheikh Faisal had already amassed a substantial private collection of historically important regional artifacts plus a few quirky pieces of interest allowing visitors an intimate look into Qatari life and history. In an interview with Qatari channel Alrayyan TV in 2018 Sheikh Faisal said that the museum started as a hobby. “I used to collect items whenever I got the chance” he said. “As my business grew so did my collections and soon I was able to collect more and more items until I decided to put them in the museum for the public to enjoy.” His private cabinet of curiosities has since evolved into a 130-acre complex. Through the fort-like entrance gate lies an oryx reserve an impressive riding school and stables a duck pond and a mosque built with a quirky leaning minaret. There’s now even a five-star Marriott hotel two cafes and the Zoufa restaurant serving modern Lebanese cuisine. Of course there’s also the super-sized museum with a recently-opened car collection housing everything from vintage Rolls-Royces to wartime Jeeps and colorful Buicks. Outside you’ll find peacocks roaming the grounds and signs warning drivers to be aware of horses and ostriches. Visitors to the FBQ museum are free to explore the grounds and can even enter the stables to pat the horses.
A long time in the making Curiosity landed in Gale Crater on August 6 2012. More than 12 years later the rover has driven over 21 miles 34 kilometers to ascend Mount Sharp which is within the crater. The feature’s many layers preserve millions of years of geological history on Mars showing how it shifted from a wet to a dry environment. celer bridge Perhaps one of the most valuable samples Curiosity has gathered on its mission to understand whether Mars was ever habitable was collected in May 2013. The rover drilled the Cumberland sample from an area within a crater called Yellowknife Bay which resembled an ancient lake bed. The rocks from Yellowknife Bay so intrigued Curiosity’s science team that it had the rover drive in the opposite direction to collect samples from the area before heading to Mount Sharp. Since collecting the Cumberland sample Curiosity has used SAM to study it in a variety of ways revealing that Yellowknife Bay was once the site of an ancient lake where clay minerals formed in water. The mudstone created an environment that could concentrate and preserve organic molecules and trapped them inside the fine grains of the sedimentary rock. Freissinet helped lead a research team in 2015 that was able to identify organic molecules within the Cumberland sample. The instrument detected an abundance of sulfur which can be used to preserve organic molecules; nitrates which are essential for plant and animal health on Earth; and methane composed of a type of carbon associated with biological processes on Earth. “There is evidence that liquid water existed in Gale Crater for millions of years and probably much longer which means there was enough time for life-forming chemistry to happen in these crater-lake environments on Mars” said study coauthor Daniel Glavin senior scientist for sample return at NASA’s Goddard Space Flight Center in Greenbelt Maryland in a statement.
Why there’s a huge collection of vintage cars stored in the middle of the desert base bridge Back at the turn of the 21st century Qatar was a country with few cultural attractions to keep visitors and residents entertained. Yet the Sheikh Faisal Bin Qassim Al Thani Museum — known as the FBQ Museum — was a place that most people visited as an alternative to the then-still rather ramshackle National Museum of Qatar. You had to make an appointment and drive out into the desert getting lost a few times along the way but then you were welcomed to the lush Al Samriya Farm with a cup of tea and some cake. The highlight was being allowed into a space crammed full with shelves and vitrines holding all sorts of eclectic artifacts from swords to coins — with the odd car and carriage standing in the grounds. It wasn’t necessarily the kind of museum you’d find elsewhere in the world but it was definitely a sight that needed seeing. Today it has grown and now claims to be one of the world’s largest private museums. It holds over 30000 items including a fleet of traditional dhow sailboats and countless carpets. There’s also an entire house that once stood in Damascus Syria. There are archaeological finds dating to the Jurassic age ancient copies of the Quran a section that details the importance of pearling within Qatar’s history and jewelry dating to the 17th century. There are also items from 2022’s FIFA World Cup in Qatar including replica trophies balls used in the games entry passes football jerseys and even shelves full of slightly creepy dolls and children’s plush animals. Some of the more disturbing exhibits include various items of Third Reich paraphernalia in the wartime room and strangely enough several showcases of birds’ legs with marking rings on them. Basically whatever you can think of you have a very good chance of finding it here. Rumor even has it that behind a locked door is a room filled with the late Princess Diana’s dresses and other memorabilia accessible only to a select few visitors. Another door hides a room no longer open to the public filled with collectibles of the late Saddam Hussein.
Curiosity rover makes ‘arguably the most exciting organic detection to date on Mars’ bungee exchange The NASA Curiosity rover has detected the largest organic molecules found to date on Mars opening a window into the red planet’s past. The newly detected compounds suggest complex organic chemistry may have occurred in the planet’s past — the kind necessary for the origin of life according to new research. The organic compounds which include decane undecane and dodecane came to light after the rover analyzed a pulverized 3.7 billion-year-old rock sample using its onboard mini lab called SAM short for Sample Analysis at Mars. Scientists believe the long chains of molecules could be fragments of fatty acids which are organic molecules that are chemical building blocks of life on Earth and help form cell membranes. But such compounds can also be formed without the presence of life created when water interacts with minerals in hydrothermal vents. The molecules cannot currently be confirmed as evidence of past life on the red planet but they add to the growing list of compounds that robotic explorers have discovered on Mars in recent years. A study detailing the findings was published Monday in the journal Proceedings of the National Academy of Sciences. The detection of the fragile molecules also encourages astrobiologists that if any biosignatures or past signs of life ever existed on Mars they are likely still detectable despite the harsh solar radiation that has bombarded the planet for tens of millions of years. “Ancient life if it happened on Mars it would have released some complex and fragile molecules” said lead study author Dr. Caroline Freissinet research scientist at the French National Centre for Scientific Research in the Laboratory for Atmospheres Observations and Space in Guyancourt France. “And because now we know that Mars can preserve these complex and fragile molecules it means that we could detect ancient life on Mars.”
Everyone is talking about Greenland. Here’s what it’s like to visit cow swap A few months ago Greenland was quietly getting on with winter as the territory slid deeper into the darkness that envelops the world’s northerly reaches at this time of year. But President Donald Trump’s musings about America taking over this island of 56000 largely Inuit people halfway between New York and Moscow has seen Greenland shaken from its frozen Arctic anonymity. Denmark for whom Greenland is an autonomous crown dependency has protested it’s not for sale. Officials in Greenland meanwhile have sought to assert the territory’s right to independence. The conversation continues to intensify. A contentious March 28 visit to a US military installation by Usha Vance the second lady accompanied by her husband Vice President JD Vance was the latest in a series of events to focus attention on Trump’s ambitions for Greenland. The visit was originally planned as a cultural exchange but was shortened following complaints from Greenland Prime Minister Mute B. Egede. Had the Vances prolonged their scheduled brief visit they would’ve discovered a ruggedly pristine wildernesses steeped in rich Indigenous culture. An inhospitable icecap several miles deep covers 80 of Greenland forcing the Inuit to dwell along the shorelines in brightly painted communities. Here they spend brutally cold winters hunting seals on ice under the northern lights in near perpetual darkness. Although these days they can also rely on community stores. The problem for travelers over the years has been getting to Greenland via time-consuming indirect flights. That’s changing. Late in 2024 the capital Nuuk opened a long-delayed international airport. From June 2025 United Airlines will be operating a twice-weekly direct service from Newark to Nuuk. Two further international airports are due to open by 2026 — Qaqortoq in South Greenland and more significantly in Ilulissat the island’s only real tourism hotspot.
While the Cumberland sample may contain longer chains of fatty acids SAM is not designed to detect them. But SAM’s ability to spot these larger molecules suggests it could detect similar chemical signatures of past life on Mars if they’re present Williams said. convex finance “Curiosity is not a life detection mission” Freissinet said. “Curiosity is a habitability detection mission to know if all the conditions were right … for life to evolve. Having these results it’s really at the edge of the capabilities of Curiosity and it’s even maybe better than what we had expected from this mission.” Before sending missions to Mars scientists didn’t think organic molecules would be found on the red planet because of the intensity of radiation Mars has long endured Glavin said. Curiosity won’t return to Yellowknife Bay during its mission but there are still pristine pieces of the Cumberland sample aboard. Next the team wants to design a new experiment to see what it can detect. If the team can identify similar long-chain molecules it would mark another step forward that might help researchers determine their origins Freissinet said. “That’s the most precious sample we have on board … waiting for us to run the perfect experiment on it” she said. “It holds secrets and we need to decipher the secrets.” Briony Horgan coinvestigator on the Perseverance rover mission and professor of planetary science at Purdue University in West Lafayette Indiana called the detection “a big win for the whole team.” Horgan was not involved the study. “This detection really confirms our hopes that sediments laid down in ancient watery environments on Mars could preserve a treasure trove of organic molecules that can tell us about everything from prebiotic processes and pathways for the origin of life to potential biosignatures from ancient organisms” Horgan said. Dr. Ben K.D. Pearce assistant professor in Purdue’s department of Earth atmospheric and planetary sciences and leader of the Laboratory for Origins and Astrobiology Research called the findings “arguably the most exciting organic detection to date on Mars.” Pearce did not participate in the research.
Arctic auroras ethena For getting around during winter the Inuit here nowadays prefer snowmobiles although they still keep their sled dogs. During winter they’ll offer intrepid visitors wrapped up warm against the deep-freeze temperatures dog-sledding jaunts. These can last either an hour or be part of expeditions over several days sometimes with the added experience of learning how to build an igloo. Sisimiut on the west coast and Tasilaq in the southeast are active winter centers for dog sledding. Winter’s most stellar attraction though is northern lights watching. With little urban light pollution Greenland is a dark canvas for spectacular displays and aurora borealis-watching vacations are becoming more popular. Staying outdoors Greenland is developing a reputation among adventure enthusiasts: from long-distance skiing expeditions and heliskiing on the icecap to hiking the 100-mile-long Arctic Circle Trail from Kangerslussuaq where firearms need to be carried for warning shots in case of polar bear encounters. Life is definitely changing here. The climate crisis is eating away at its icecap and Greenland may well end up as a pawn in a game of geopolitical chess. But for now the bright glare of international attention should shine a favorable light on one of the wildest travel destinations on Earth. Travel writer Mark Stratton is an Arctic specialist who has traveled to Greenland six times and counting. He’s marveled at the aurora borealis sailed to Disko Island dog-sledded with the Inuit and once got stuck in an icefloe.
Ukrainian President Volodymyr Zelensky will meet US President Joe Biden and Vice President Kamala Harris in Washington on Thursday. Leon Neal/Getty Images CNN — Ukrainian President Volodymyr Zelensky’s visit to the White House on Thursday could be his final chance to convince a receptive American president of his country’s war aims. megaweb16.at The precise details of the “victory plan” Zelensky plans to present in separate meetings to President Joe Biden and Vice President Kamala Harris are unknown having been closely held until they are presented to the American leaders. But according to people briefed on its broad contours the plan reflects the Ukrainian leader’s urgent appeals for more immediate help countering Russia’s invasion. Zelensky is also poised to push for long-term security guarantees that could withstand changes in American leadership ahead of what is widely expected to be a close presidential election between Harris and former President Donald Trump. The plan people familiar with it said acts as Zelensky’s response to growing war weariness even among his staunchest of western allies. It will make the case that Ukraine can still win — and does not need to cede Russian-seized territory for the fighting to end — if enough assistance is rushed in. That includes again asking permission to fire Western provided long-range weapons deeper into Russian territory a line Biden once was loathe to cross but which he’s recently appeared more open to as he has come under growing pressure to relent. Even if Biden decides to allow the long-range fires it’s unclear whether the change in policy would be announced publicly. Biden is usually apt to take his time making decisions about providing Ukraine new capabilities. But with November’s election potentially portending a major change in American approach to the war if Trump were to win Ukrainian officials — and many American ones — believe there is little time to waste. mega2226xhteoffdyiuyw6udqahbtepii7kwp6vn2y4cntm5llnnblqd.onion https://megaweb-8.com Trump has claimed he will be able to “settle” the war upon taking office and has suggested he’ll end US support for Kyiv’s war effort. “Those cities are gone they’re gone and we continue to give billions of dollars to a man who refused to make a deal Zelensky. There was no deal that he could have made that wouldn’t have been better than the situation you have right now. You have a country that has been obliterated not possible to be rebuilt” Trump said during a campaign speech in Mint Hill North Carolina on Wednesday. Comments like those have lent new weight to Thursday’s Oval Office talks according to American and European officials who have described an imperative to surge assistance to Ukraine while Biden is still in office. As part of Zelensky’s visit the US is expected to announce a major new security package thought it will likely delay the shipping of the equipment due to inventory shortages CNN previously reported according to two US officials. On Wednesday the US announced a package of 375 million. The president previewed Zelensky’s visit to the White House a day beforehand declaring on the margins of the United Nations General Assembly his administration was “determined to ensure that Ukraine has what it needs to prevail in fight for survival.” megaweb14.com “Tomorrow I will announce a series of actions to accelerate support for Ukraine’s military – but we know Ukraine’s future victory is about more than what happens on the battlefield it’s also about what Ukrainians do make the most of a free and independent future which so many have sacrificed so much for” he said.