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Idézet tőle: Guest ekkor: 2025-03-31, 10:14Посетите интернет-магазин https://sharpsting.ru и оцените разнообразие товаров: от современных гаджетов до полезных аксессуаров. Мы ценим каждого клиента и стремимся предоставить лучший сервис. Присоединяйтесь к числу наших довольных покупателей уже сегодня
Посетите интернет-магазин https://sharpsting.ru и оцените разнообразие товаров: от современных гаджетов до полезных аксессуаров. Мы ценим каждого клиента и стремимся предоставить лучший сервис. Присоединяйтесь к числу наших довольных покупателей уже сегодня
Idézet tőle: Guest ekkor: 2025-03-31, 10:34A 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.
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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.
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.
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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.
Idézet tőle: Guest ekkor: 2025-03-31, 10:38Посетите интернет-магазин https://sharpsting.ru и оцените разнообразие товаров: от современных гаджетов до полезных аксессуаров. Мы ценим каждого клиента и стремимся предоставить лучший сервис. Присоединяйтесь к числу наших довольных покупателей уже сегодня
Посетите интернет-магазин https://sharpsting.ru и оцените разнообразие товаров: от современных гаджетов до полезных аксессуаров. Мы ценим каждого клиента и стремимся предоставить лучший сервис. Присоединяйтесь к числу наших довольных покупателей уже сегодня
Idézet tőle: Guest ekkor: 2025-03-31, 10:38Iceberg flotillas
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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 100,000-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.
Iceberg flotillas
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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 100,000-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.
Idézet tőle: Guest ekkor: 2025-03-31, 11:18Посетите интернет-магазин https://sharpsting.ru и оцените разнообразие товаров: от современных гаджетов до полезных аксессуаров. Мы ценим каждого клиента и стремимся предоставить лучший сервис. Присоединяйтесь к числу наших довольных покупателей уже сегодня
Посетите интернет-магазин https://sharpsting.ru и оцените разнообразие товаров: от современных гаджетов до полезных аксессуаров. Мы ценим каждого клиента и стремимся предоставить лучший сервис. Присоединяйтесь к числу наших довольных покупателей уже сегодня
Idézet tőle: Guest ekkor: 2025-03-31, 11:32Посетите интернет-магазин https://sharpsting.ru/ и оцените разнообразие товаров: от современных гаджетов до полезных аксессуаров. Мы ценим каждого клиента и стремимся предоставить лучший сервис. Присоединяйтесь к числу наших довольных покупателей уже сегодня
Посетите интернет-магазин https://sharpsting.ru/ и оцените разнообразие товаров: от современных гаджетов до полезных аксессуаров. Мы ценим каждого клиента и стремимся предоставить лучший сервис. Присоединяйтесь к числу наших довольных покупателей уже сегодня
Idézet tőle: Guest ekkor: 2025-03-31, 11:33Strategy and Planning: How an SEO Agency Sets the Stage for Success
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Before any tangible optimization begins, a reputable SEO agency invests time in research and planning. They evaluate the client’s goals, industry landscape, and competitor positioning. If, for instance, a client aims to capture local customers, the agency may focus on local SEO tactics like Google Business Profile optimization and localized content. On the other hand, an e-commerce client might need a product-centric strategy emphasizing product page optimizations, schema markup, and robust category descriptions. This strategic planning phase is crucial because it ensures that every subsequent action is driven by data, aligning with the client’s broader marketing objectives.
Strategy and Planning: How an SEO Agency Sets the Stage for Success
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Before any tangible optimization begins, a reputable SEO agency invests time in research and planning. They evaluate the client’s goals, industry landscape, and competitor positioning. If, for instance, a client aims to capture local customers, the agency may focus on local SEO tactics like Google Business Profile optimization and localized content. On the other hand, an e-commerce client might need a product-centric strategy emphasizing product page optimizations, schema markup, and robust category descriptions. This strategic planning phase is crucial because it ensures that every subsequent action is driven by data, aligning with the client’s broader marketing objectives.
Idézet tőle: Guest ekkor: 2025-03-31, 11:56Особенности взаимодействия на «форуме для родителей»
На большинстве форумов реализован удобный функционал:
Возможность задать анонимный вопрос, если тема слишком личная и вы не хотите раскрывать свою личность;
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Система личных сообщений для приватного общения и дружеской поддержки;
Разделы с полезными материалами: статьи, ссылки на вебинары, видеоуроки, чек-листы;
Механизмы рейтинга и отметок («лайки», «спасибо»), помогающие находить наиболее полезные комментарии;
Модерация, следящая за порядком и корректным общением – ни спама, ни оскорблений.
Особенности взаимодействия на «форуме для родителей»
На большинстве форумов реализован удобный функционал:
Возможность задать анонимный вопрос, если тема слишком личная и вы не хотите раскрывать свою личность;
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Система личных сообщений для приватного общения и дружеской поддержки;
Разделы с полезными материалами: статьи, ссылки на вебинары, видеоуроки, чек-листы;
Механизмы рейтинга и отметок («лайки», «спасибо»), помогающие находить наиболее полезные комментарии;
Модерация, следящая за порядком и корректным общением – ни спама, ни оскорблений.
Idézet tőle: Guest ekkor: 2025-03-31, 12:24Water 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.
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.”
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.
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.”
Idézet tőle: Guest ekkor: 2025-03-31, 12:51Arctic 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.
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.