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Top News In பெர்மாஃப்ரோஸ்ட் ஆபத்துகள் Today - Breaking & Trending Today

Mammoth DNA Breaks Record for World's Oldest Sequence

The First Example of Hybrid Speciation in Ancient DNA
The new study has also amplified the ability for researchers to track the evolutionary process of speciation – the formation of new and distinct species. A
Nature press release states that this process generally occurs “over time periods that are thought to be beyond the limits of DNA research.”
A tusk from a woolly mammoth discovered in a creek bed on Wrangel Island in 2017. (Credit: Love Dalén)
Nonetheless, the scientists’ study of the mammoth DNA suggests that there was not one, but two different lineages of mammoth alive during the Early Pleistocene in the region of what is now eastern Siberia. Adycha and Chukochya are believed to be members of a species that spawned the woolly mammoth, but Krestovka appears to come from an unknown, and possibly entirely new, mammoth lineage. Tom van der Valk, the study’s lead author and a bioinformatician at the University of Uppsala in Sweden, explains the ....

Sakha Yakutiya , United States , Wrangel Island , Chukotskiy Avtonomnyy Okrug , Uppsala Lan , Orenburgskaya Oblast , Gleb Danilov , Russian Academy Of Sciences , Centre For Palaeogenetics , University Of Uppsala , Swedish Museum Of Natural History , Middle Pleistocene , Love Dal , Ancient Mammoth , Broken Records , Russian Academy , Yukon Territory , First Example , Hybrid Speciation , Early Pleistocene , North America , North American Columbian , Swedish Museum , Natural History , Ice Age , Bio Chemical ,

Abnormal freezes and melting glaciers highlight global challenge of climate change

Abnormal freezes and melting glaciers highlight global challenge of climate change
By Karl Wilson in Sydney and Vivien Xu in Hong Kong |
chinadaily.com.cn |
Updated: 2021-02-19 17:02
A man removes snow from a car during a snowstorm in the Brooklyn borough of New York, Feb 2, 2021. [Photo/Agencies]
It is being called the Big Freeze as abnormal winter snowstorms and freezing temperatures cut a crippling swathe through large parts of the United States.
The southern state of Texas is, for the first time ever, blanketed in snow paralyzing the state s electricity grid, causing deaths and filling hospital beds already struggling with COVID-19 cases with dozens of people suffering from hyperthermia. ....

United Kingdom , New York , United States , Vinod Thomas , Judah Cohen , Jennifer Francis , Lee Kuan Yew School Of Public , Yale School Of The Environment , British Antarctic Survey In Cambridge , Climate Council Steffen , Climate Council , Environmental Research , National University Of Singapore , Woodwell Climate Research Center , China Daily , Middle East , Pacific Island , British Antarctic Survey , Will Steffen , Yale School , Industrial Revolution , Lee Kuan Yew School , Public Policy , National University , Arctic Circle , ஒன்றுபட்டது கிஂக்டம் ,

Huge pits forming in Arctic permafrost : Environment, Weather & Climate - Page 7 - Peak Oil News and Message Boards

KaiserJeep » Sat 25 Mar 2017, 17:23:06
OK, I will concede that methane, like water vapor, is a powerful GHG, and that both are worse than carbon dioxide. But we know that the N polar icecap has flat out disappeared during past interglacials, and that both the polar bears and the humans - anyways our hominid precursers, survived just fine. The permafrost must have melted then, too.
Is it any worse today than then? We still have ice up North, and we still seem to be at least 10 degrees C below the peak Climatic Optimum temperatures in the fossil/ice core/tree ring records. ....

Climatic Optimum , Great Lake , காலநிலை உகந்த , நன்று ஏரி ,

Scientists Have Sequenced Mammoth DNA That's Over a Million Years Old

Scientists Have Sequenced Mammoth DNA That s Over a Million Years Old
17 FEBRUARY 2021
In a feat right at the limits of our scientific capabilities, an international team of geneticists has recovered and sequenced the oldest DNA to date.
From the teeth of three ancient mammoths that roamed Siberia between 700,000 and 1.2 million years ago, the researchers extracted extremely degraded DNA, and pieced it back together to reveal a previously unknown genetic mammoth lineage.

Previously, the oldest recovered DNA sample was from a horse bone found in the Yukon permafrost, dating back to between 560,000 and 780,000 years ago.
This DNA is incredibly old, said evolutionary geneticist Love Dalén of the Centre for Palaeogenetics in Sweden. The samples are a thousand times older than Viking remains, and even pre-date the existence of humans and Neanderthals. ....

United States , Uppsala Lan , Uppsala University , University Of Copenhagen , Centre For Palaeogenetics , Love Dal , North America , Bering Land Bridge , Amp Quot , ஒன்றுபட்டது மாநிலங்களில் , பல்கலைக்கழகம் ஆஃப் கோபெந்ஹேகந் , காதல் பருப்பு , வடக்கு அமெரிக்கா , பெரிங் நில பாலம் ,

Million-year-old DNA from mammoth teeth found in Siberia is oldest genome ever sequenced

Million-year-old DNA from mammoth teeth found in Siberia is oldest genome ever sequenced
Posted
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FebFebruary 2021 at 9:46pm
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The ancient DNA, which came from the teeth of mammoths that once walked Siberia, is the oldest ever to be reconstructed.
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It s not quite Jurassic Park, but scientists have successfully extracted and reconstructed million-year-old DNA from mammoth teeth and solved a couple of mysteries about the creatures evolutionary history along the way.
Key points: ....

University Of Adelaide , South Australia , United States , Uppsala Lan , Bastien Llamas , Morten Allentoft , Curtin University , Stockholm Uppsala University , Jurassic Park , Uppsala University , Professor Dal , Professor Allentoft , North America , தெற்கு ஆஸ்திரேலியா , ஒன்றுபட்டது மாநிலங்களில் , பாஸ்டின் லாமாக்கள் , கர்டின் பல்கலைக்கழகம் , ஜுராசிக் பூங்கா , ப்ரொஃபெஸர் பருப்பு , வடக்கு அமெரிக்கா ,