Libro de Visitas

Williamthous

03 May 2025 - 05:24 am

‘Dyson spheres’ were theorized as a way to detect alien life. Scientists say they’ve found potential evidence
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What would be the ultimate solution to the energy problems of an advanced civilization? Renowned British American physicist Freeman Dyson theorized it would be a shell made up of mirrors or solar panels that completely surrounds a star — harnessing all the energy it produces.

“One should expect that, within a few thousand years of its entering the stage of industrial development, any intelligent species should be found occupying an artificial biosphere which completely surrounds its parent star,” wrote Dyson in a 1960 paper in which he first explained the concept
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If it sounds like science fiction, that’s because it is: Dyson took the idea from Olaf Stapledon’s 1937 novel “Star Maker,” and he was always open about that. The late scientist was a professor emeritus at the Institute of Advanced Study in Princeton, New Jersey.
Still, coming from a thinker who some in the scientific community say might have been worthy of a Nobel Prize early in his career, the concept took hold and the hypothetical megastructures became known as Dyson spheres, even though the physicist later clarified that they would actually consist of “a loose collection or swarm of objects traveling on independent orbits around the star.”

In his paper, Dyson also noted that Dyson spheres would give off waste heat detectable as infrared radiation, and suggested that looking for that byproduct would be a viable method for searching for extraterrestrial life. However, he added that infrared radiation by itself would not necessarily mean extraterrestrial intelligence, and that one of the strongest reasons for searching for such sources was that new types of natural astronomical objects might be discovered.

“Scientists (at the time) were largely receptive, not to the likelihood that alien civilisations would be found to exist, but that a search for waste heat would be a good place to look,” said George Dyson, a technology writer and author and the second of Dyson’s six children, via email. “Science fiction, from ‘Footfall’ to ‘Star Trek,’ took the idea and ran with it, while social critics adopted the Dyson sphere as a vehicle for questioning the wisdom of unlimited technological growth.”

Michaelapado

03 May 2025 - 04:59 am

Broken spheres
Dyson died in 2020 before any of his spheres could be found — although they are just one of a dozen ideas that bear his name.
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“As a young scientist, Dyson showed that three competing quantum theories were actually the same theory — he summarily ended the competition,” said William Press, the Leslie Surginer Professor of Computer Science and Integrative Biology at the University of Texas at Austin. He was not involved in the study. “Later, he applied his genius to areas of astronomy, cosmology, the extraterrestrial realm, and also the very real problem of nuclear proliferation here on planet Earth. At the time of his death, he was recognized as a provocative and creative thinker.”

George Dyson also attested to his father’s fascination and comprehensive reach across disciplines.
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“Taking advantage of a short attention span and an aversion to bureaucracy, he contributed to five fields of mathematics and eleven fields of physics, as well as to theoretical biology, engineering, operations research, literature, and public affairs,” the younger Dyson said. “Many of his ideas were controversial, with one of his guiding principles being that ‘It is better to be wrong than to be vague.’”

The approach of the researchers behind the new study could offer a more fruitful path in the search for extraterrestrial intelligence, said Tomotsugu Goto, an associate professor of astronomy at the National Tsing Hua University in Taiwan. He also was not involved with the study.

“However, contamination by circumstellar debris disks, which mimic Dyson Sphere infrared signatures, remains a concern,” he added in an email. “Authors argue that the debris disks around (dwarf stars) are rare, but the 7 candidate authors selected out of 5 million sources are also rare. Despite this, the seven candidates warrant further investigation with powerful telescopes for a more definitive evaluation.”

Donaldavemi

03 May 2025 - 03:45 am

Water and life
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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.
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.”

Rogerwam

03 May 2025 - 02:11 am

Siham Haleem, a private tour guide for 15 years, says that Doha now has many world-class, modern museums — the National Museum of Qatar being a firm personal favorite. And yet he says that visiting Sheikh Faisal’s museum should still be on everybody’s to-do list.
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“For those eager to learn about Qatar’s — and the region’s — heritage and beyond, the museum is an ideal destination,” he says. “Personally, I’m captivated by the car collection, the fossils, and especially the Syrian house, painstakingly transported and reassembled piece by piece.”

Stephanie Y. Martinez, a Mexican-American student mobility manager at Texas A&M University in Qatar likes the museum so much she includes it on all of her itineraries for students visiting from the main campus in Texas.

“The guided tours are very detailed, and the collections found at the museum have great variety and so many stories to unfold,” she says. “Truly, the museum has something to pique everyone’s interest. My favorites are the cars and the furniture exhibits showcasing wood and mother-of-pearl details. Definitely one of my favorite museums in Qatar, every time I visit I learn something new.”

Raynor Abreu, from India, also had praise for the unusual and immense collection.

“Each item has its own story, making the visit even more interesting,” he says. “It’s also impressive to know that Sheikh Faisal started collecting these unique pieces when he was very young. Knowing this makes the museum even more special, as it reflects his lifelong passion for history and culture.”

It takes time and dedication to truly examine the many collections within the museum — especially since most of them are simply on display without explanation.

Eclectic it may be, but it’s hard to fault the determination of Sheikh Faisal, who has brought together items that tell the story of Qatar and the Middle East.

Sarah Bayley, from the UK, says she visited the museum recently with her family, including 16 and 19-year-old teenagers, and was won over by its sheer eccentricity.

“Amazing. Loved it. It is a crazy place.”

Modestotat

03 May 2025 - 01:17 am

Tbilisi, Georgia — Jailed journalist Mzia Amaghlobeli gets weaker every day as her hunger strike has reached three weeks in Rustavi, a town near the Georgian capital of Tbilisi, her lawyer says. Now the 49-year-old is having difficulty walking the short distance from her cell to the room where they usually meet, and human rights officials, colleagues and family fear for her life.
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Amaghlobeli was arrested Jan. 12 during an anti-government protest in the coastal city of Batumi, one of over 40 people in custody on criminal charges from a series of demonstrations that have hit the South Caucasus nation of 3.7 million in recent months.
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The political turmoil follows a parliamentary election that was won by the ruling Georgian Dream party, although its opponents allege the vote was rigged.

Protests highlight battle over Georgia's future. Here's why it matters.
Its outcome pushed Georgia further into Russia's orbit of influence. Georgia aspired to join the European Union, but the party suspended accession talks with the bloc after the election.

As it sought to cement its grip on power, Georgian Dream has cracked down on freedom of assembly and expression in what the opposition says is similar to President Vladimir Putin's actions in neighboring Russia, its former imperial ruler.
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Dannytix

03 May 2025 - 01:04 am

Broken spheres
Dyson died in 2020 before any of his spheres could be found — although they are just one of a dozen ideas that bear his name.
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“As a young scientist, Dyson showed that three competing quantum theories were actually the same theory — he summarily ended the competition,” said William Press, the Leslie Surginer Professor of Computer Science and Integrative Biology at the University of Texas at Austin. He was not involved in the study. “Later, he applied his genius to areas of astronomy, cosmology, the extraterrestrial realm, and also the very real problem of nuclear proliferation here on planet Earth. At the time of his death, he was recognized as a provocative and creative thinker.”

George Dyson also attested to his father’s fascination and comprehensive reach across disciplines.
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“Taking advantage of a short attention span and an aversion to bureaucracy, he contributed to five fields of mathematics and eleven fields of physics, as well as to theoretical biology, engineering, operations research, literature, and public affairs,” the younger Dyson said. “Many of his ideas were controversial, with one of his guiding principles being that ‘It is better to be wrong than to be vague.’”

The approach of the researchers behind the new study could offer a more fruitful path in the search for extraterrestrial intelligence, said Tomotsugu Goto, an associate professor of astronomy at the National Tsing Hua University in Taiwan. He also was not involved with the study.

“However, contamination by circumstellar debris disks, which mimic Dyson Sphere infrared signatures, remains a concern,” he added in an email. “Authors argue that the debris disks around (dwarf stars) are rare, but the 7 candidate authors selected out of 5 million sources are also rare. Despite this, the seven candidates warrant further investigation with powerful telescopes for a more definitive evaluation.”

Lavillprume

02 May 2025 - 10:12 pm

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Jamesfougs

02 May 2025 - 05:29 pm

In the past, Mixero was one of the most popular Bitcoin mixers available in the cryptocurrency world. The first of its kind, this bitcoin mixer was shut down temporarily before returning to limited service. Nowadays, Mixero is primarily used to facilitate anonymous individual transactions. Yomix : Excellent customer support Bitcoin Laundry : Uses stealth pools to anonymize transactions Coin Mixer : Fast payouts Coinmize : Zero-log policy Bitcoin Mixer : It offers flexible transaction fees and a low minimum transaction limit 1. Yomix - Excellent customer support Let’s take a look at another one of the leading bitcoin mixers which is incredibly easy to operate. Yomix has a straightforward interface and it is worth mentioning that the service fee is the lowest possible, it is 0.0% with 0.0002 BTC per extra address. Retention period is 7 days when it is easy for a user to manually remove all the logs which are saved for this period because of any future transaction-related problems. There is a time-delay feature, however, it is not possible to be controlled by a user but the mixing platform only.How it works: unlike other mixers, this site cleans coins with bitcoins purchased by them on cryptocurrency exchanges. Yomix io examines purchased coins using a scoring system with innovative algorithms and the use of technologies such as blockchain volume analysis, cluster analysis, pollution analysis, etc. After that, you will receive your BTC back, divided into random parts, and even sent in different addresses, if necessary. The whole process takes about 6 hours. The mixer does not require registration and does not store any logs. After each mixing operation, a letter of guarantee is sent, and information about it is eliminated after 24 hours, ensuring complete anonymity. The service also provides round-the-clock technical support. MixTum io charges a flat fee of 5% of the transaction, as well as a network fee of 0.00015 BTC. The program has two versions – for regular browsers and Tor.One of the most currency-rich mixers in the industry, letting us Mix not just Bitcoin but Litecoin, Bitcoin Cash and Ethereum (coming soon) is what Yomix is. Also flaunts probably the most colourful and easy to use Interfaces I’ve ever seen. Provides 100% Control to users regarding every aspect of the mix. As in, users control the exact amount of fee (to the 4th decimal point!), the exact time-delay (by the minute and not just hours) and also the Percentage distribution. It’s transparent and even has a “fee calculator” which displays the exact amount of funds a user would receive on each additional address, as well as the total service and the address-fee. Maximum 8 total output addresses allowed. The minimum service fee a user can pay is 1%, with the maximum being 5%. The additional address fee is 0.00045529 BTC, 0.01072904 LTC, and 0.00273174 BCH for Bitcoin, Litecoin and Bitcoin Cash respectively. Has three fund-pools, and they all have funds from different sources in them which have different levels of anonymity. Does have a “No Logs Policy”. No registration required.Yomix is a btc shuffle service needed to hide your transfers in the bitcoin world. Yomix currently has a minimum withdrawal threshold of 0.03500000 BTC, so users are advised to deposit more than the entry threshold plus commission, otherwise they will not be able to withdraw funds. The client is asked to set 5 exit addresses. If for some reason, even after a delay of two hours, the user’s balance is not updated, the mixer can contact the support service to take action. For customers who have been inactive for several days, it can take up to 15 minutes after logging in before you see outstanding deposits. Transaction histories are automatically deleted within 1 week after that. The program runs on a dedicated server that is openly connected via the Internet (you don’t need to do this when using the Tor browser). The Bitcoin mixer is launched on another machine, all suspicious activity is monitored, and the website is automatically protected in case of any indication that it is under DDoS attack. Pros: 24/7 customer support Excellent customer support 2. Bitcoin Laundry - Uses stealth pools to anonymize transactions Bitcoin Laundry is another one that requires consideration. It supports Bitcoin cryptocurrency bearing no logs policy. It requires a minimum deposit of 0.001 BTC and the transaction fee is 4–5%. It supports multiple addresses of 2 or custom options and requires confirmation. No registration is required and it does not offer a referral program. Letter of guarantee is offered.This Bitcoin Laundry also supports Bitcoin and other cryptocurrencies like Ethereum, Bitcoin Cash, and Litecoin bearing no logs policy. It requires a minimum deposit of 0.005 BTC, 0.01 BCH, 0.1 ETH, 1 LTC, and the transaction fee is 0.5% plus 0.0005 for each extra address. It supports multiple addresses of up to 10 and requires confirmation from 1 to 50. No registration is required and it does offer a referral program. Also, it comes with a letter of guarantee.How it works: it has its own cryptocurrency reserve, which can be represented as a chain of bitcoins. When you transfer your funds to the Blender io, the resource sends your funds to the end of the chain and sends you new coins from the beginning of the chain that have nothing to do with the old coins. therefore, there can be no connection between incoming and outgoing coins. Only coins that go from your wallet to the Bitcoin Laundry address can be tracked through the public ledger, but no further. Blender io does not require you to register or provide any information other than the “receiving address“! It does not require identity confirmation and registration, but it is mandatory to provide in addition to the “receiving address”. The additional withdrawal delay feature has been extended to the maximum and offers installation up to 24 times a day. Other servers do not have such a wide range of latencies. Each set of unrefined coins can be split into as many as 8 pieces and sent to different addresses with an additional fee of 0.00008 BTC per address.Bitcoin Laundry is one of the best Bitcoin Tumbler services, that I’m stating based on my personal experiences and the positive reviews of other users on the Internet. It works both as a Bitcoin Tumbler, as well as a swapper, meaning you can clean your coins, and receive them in a different cryptocurrency as well which further adds to their anonymity. As a Bitcoin Tumbler, they let you set a custom service fee, the higher this fee is, the better your coins are anonymized. There’s a time-delay option as well which let’s you add an extra layer of protection by delaying your transaction by up to 24 hours, so you receive your coins not instantly but at a later time set by you. As of now, it supports the following coins: Bitcoin Ethereum Bitcoin Cash Litecoin The minimum fee of mixing coins for Bitcoin is 0.8% + 0.0008BTC / forwarding address. Note that there is a minimum transaction limit of 0.01BTC/transaction, and anything below that limit is still accepted but considered “donations” and hence isn’t returned to the senders. As for confirmation, it needs 1 confirmation before it cleans your Bitcoins. And the time needed for the whole process is generally instant, except when you’ve manually specified a time-delay. Also, obviously there also is a “Guarantee certificate” which helps you resolve any future conflicts and issues. It also features a “no logs policy” like all the other Bitcoin Tumbler services on this list, and automatically deletes your order history and all the other data after 24 hours. Well, this is just one of the many available Bitcoin Tumbler services, so let’s head over to the other available options. Pros: Extensive FAQ section Customizable mixing settings for better anonymity 3. Coin Mixer - Fast payouts Mixing Bitcoins is made simpler with Coin Mixer. A mixer available both on the Clearnet and the Tor network. Offers complete control over the time-delays and fund-distribution. Charges a static fee of 0.3%. Maximum number of output addresses allowed is 10. Each address is charged an additional 0.0001BTC. Largest possible mix is 100 BTC, while smallest accepted deposit is 0.002 BTC. No registration required. Has a No Logs Policy, retains logs for 7-days by default. Although users can delete logs anytime before the 7-day period manually. Does provide Certificate of Origin. Also has an “Instant Dispatch” feature of delivering coins without any delay.Coin Mixer is one of the most pocket-friendly, easy to use and customizable Bitcoin laundry platforms in the industry. The user-interface is extremely simple and clean, anyone who has never before used any such service too can navigate around and tumble Bitcoins easily. No registration is required to mix Bitcoins on Blender.io Its “delay” feature lets you set delays from 1-24 hours which increases your anonymity by providing a gap between the deposited coins and the outgoing ones. As for the fee, it’s dynamic, meaning you get to choose the amount of fee you’d like to pay, the minimum fee being 0.5% and the maximum being 2.5% with an additional 0.0005%/address. It’s also one of the rare platforms which provides you with a mixing code which makes sure your previous coins do not get mixed with your newer deposits if you do multiple deposits to the tumbler. The minimum amount you can mix is 0.001BTC while there’s no specific maximum amount as their Bitcoin reserve seems to be quite large. It also has a No Logs Policy and all data is instantly deleted as soon as a transaction is complete; and as for the number of confirmations required it’s 3 for your deposit to be mixed by Coin Mixer It supports 8 addresses for each mix so you can further increase your anonymity. In a nutshell, it gives you the power to choose, is fast, anonymous and totally worth a try. It also supports Segwit and bech32 Addresses, with some terms attached. For e.g. only witness version bech32 addresses are supported. Similarly, only the addresses starting with the number “3” are supported.Coin Mixer is another one of the mixer that deserves to top most Bitcoin mixer charts based. For starters its user-interface is one of the simplest and easiest to understand. Then, it supports as many as 10 additional addresses, which is the maximum most mixers on this list support. Its fee based on address, 0.0002 per address, no service fee. It has a no logs policy with a 7-day default retention of the logs for support and transaction-related issues, although users get to permanently and instantly delete the logs manually whenever they wish anytime before this 7-day auto clear period as well. Does provide distribution control for each individual address separately; time-delay too is available although it’s randomly set by the platform and not user-controlled. The minimum limit too is quite low at just 0.0005BTC while the maximum limit depends on the real-time reserves. Bottom line, apart from lower user-control on fee and time-delays it’s pretty perfect.Coin Mixer is a Bitcoin mixing service that provides privacy by using the ‘Bitcoin Mixer 2.0’ algorithm to shuffle bitcoins. Unlike other similar tumbling services that mix your coins with the coins of other users, this platform mixes your crypto with the crypto bought by them directly from the cryptocurrency stock exchanges. Coin Mixer verifies the newly purchased coins with a scoring system with the help of innovative algorithms and outfoxes such technologies as blockchain volume analysis, cluster analysis, taint analysis, etc. It means that you will receive your BTC back split into random parts, and even at the different addresses if needed. Consequently, your privacy is protected as there is no connection to you. And it takes up to 6 hours to complete your request. Another privacy feature of this mixer service is that it does not require registration and it does not store logs. All the transactions are digitally signed with letters of guarantee that you can check on the website at any moment. They also provide 24/7 technical support. MixTum.io will charge you a 5% Fee from your transaction as well as a network fee of 0.00015 BTC. The platform provides two versions – for Clearnet and Tor browsers. Pros: It has a positive reputation among the Bitcoin communitySecure Exchange 4. Coinmize - Zero-log policy Coinmize offers a good number of features and has a no logs policy. To get started, you’ll need to deposit a minimum of 0.0015 BTC with no transaction fees charged. As an added plus, Coinmize supports multiple addresses with a maximum of 5. You won’t have to register to use this service – which is great for those who prize their privacy. However, the site does not offer a referral program.Coinmize is a simple service that will increase your privacy while using Ethereum and making Ether transactions. Every single person have its right for a personal privacy even when transacting, trading or donating Ether. Due to ethereum blockchain features you are not completely anonymous while using ETH and here comes Ethereum Mixing Service to help you cut all ties between your old and fresh mixed ETH coins. Using Coinmize mixer makes almost impossible to trace your new Ethereum Address..Coinmize has a deposit requirement of 0.001 BTC and supports a maximum of 2 different addresses. Registration is not compulsory but there is a service charge of 4 – 5% on the amount being transferred. For those with a need for additional privacy, Coinmize also accepts Bitcoins with a no log policy.One of the most currency-rich mixers in the industry, letting us Mix not just Bitcoin but Litecoin, Bitcoin Cash and Ethereum (coming soon) is what Coinmize is. Also flaunts probably the most colourful and easy to use Interfaces I’ve ever seen. Provides 100% Control to users regarding every aspect of the mix. As in, users control the exact amount of fee (to the 4th decimal point!), the exact time-delay (by the minute and not just hours) and also the Percentage distribution. It’s transparent and even has a “fee calculator” which displays the exact amount of funds a user would receive on each additional address, as well as the total service and the address-fee. Maximum 8 total output addresses allowed. The minimum service fee a user can pay is 1%, with the maximum being 5%. The additional address fee is 0.00045529 BTC, 0.01072904 LTC, and 0.00273174 BCH for Bitcoin, Litecoin and Bitcoin Cash respectively. Has three fund-pools, and they all have funds from different sources in them which have different levels of anonymity. Does have a “No Logs Policy”. No registration required. Pros: Uses stealth pools to anonymize transactions Fast payouts 5. Bitcoin Mixer - It offers flexible transaction fees and a low minimum transaction limitBitcoin Mixer is another one that requires consideration. It supports Bitcoin cryptocurrency bearing no logs policy. It requires a minimum deposit of 0.001 BTC and the transaction fee is 4–5%. It supports multiple addresses of 2 or custom options and requires confirmation. No registration is required and it does not offer a referral program. Letter of guarantee is offered.Another coin scrambler Mixtum offers you a so-called free trial period what means that there are no service or transaction fee charged. The process of getting renewed coins is also quite unique, as the tumbler requires a request to be sent over Tor or Clearnet and renewed coins are acquired from stock exchanges.Bitcoin Mixer offers a unique service with a high degree of confidentiality, which will ensure the anonymity of your payments, by using the mixing of multiple Bitcoin addresses. Our system works quickly, reliably and with a small commission – only after the transfer and receipt of funds to the final address. Of course, all of the data about your transaction will be irretrievably deleted.Bitcoin Mixer is a coin cleaning service that can hide your footprints in the cryptocurrency world. Currently, Bitcoin Mixer has a minimum withdrawal threshold of 0.03500000 BTC, so users are advised to transfer more than the entry threshold plus commission, otherwise they will not be able to withdraw funds. The client is given 5 exit addresses to be set. If for some reason, even after a delay of two hours, the user’s balance does not update, then the client can contact the support service to take action. For users who have been inactive for several days, it can take up to 15 minutes after logging in before you see outstanding deposits. The logs are kept for 7 days after which they are automatically deleted. The platform runs on a dedicated server that is openly connected via the Internet (you don’t need to do this when using the Tor browser). The Bitcoin mixer runs on a different machine, all suspicious activity is monitored and the website is automatically blocked on any signal that it is under intrusion. Pros: User-controlled time delaysIt offers flexible transaction fees and a low minimum transaction limit

Davidfumma

02 May 2025 - 05:14 pm

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.
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“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.

Jasontrisp

02 May 2025 - 04:42 pm

Arctic auroras
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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.