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How the Greenland shark can live for centuries
  + stars: | 2024-12-14 | by ( Ashley Strickland | ) edition.cnn.com   time to read: +6 min
Ocean secretsA Greenland shark is seen swimming beneath the ice near northern Baffin Island in the Canadian Arctic. Avalon.red/Alamy Stock PhotoThe rarely seen Greenland shark is a sluggish creature, slowly swimming through the deep waters of the North Atlantic and Arctic oceans. The polar fish is the only species of shark that can withstand the freezing temperatures year-round. The large sharks also live to be more than 400 years old, and some of them may have been alive since colonial times. The carcass, studied by whale scientists and members of the local Māori community, yielded precious clues about the deep-sea-diving animal.
Persons: CNN —, ” Peter Pan, J.M, Jonathan, Tess Crowley, Anton van Helden, Tom Björklund, Max Planck, , Priya Moorjani, , NASA Juno spacecraft’s, Ashley Strickland, Katie Hunt, Jackie Wattles Organizations: CNN, Chicago Tribune, Fish and Wildlife Service, University of California, Pacific, NASA, CNN Space, Science Locations: St, Helena, Baffin, Chicago Park, New Zealand, what's, Ranis, Germany, what’s, Berkeley
CNN —Scientists say they have recovered the oldest known Homo sapiens DNA from human remains found in Europe, and the information is helping to reveal our species’ shared history with Neanderthals. Scientists have known since the first Neanderthal genome was sequenced in 2010 that early humans interbred with Neanderthals, a bombshell revelation that bequeathed a genetic legacy still traceable in humans today. Over this 7,000-year time frame, early humans encountered Neanderthals, had sex and gave birth to children on a fairly regular basis. It’s not clear why people in East Asia today have more Neanderthal ancestry than Europeans, or why Neanderthal genomes from this period show little evidence of Homo sapiens DNA. DNA from her skull was sequenced in a previous study, and researchers involved in the Nature study were able to connect her to the Ranis individuals.
Persons: sapiens, Martin Schutt, ” Priya Moorjani, Tony Capra, , Capra, wasn’t, Marek Jantač, ” Capra, Leonardo Iasi, Max Planck, don’t, Johannes Krause, Homo, Krause Organizations: CNN —, University of California, Bakar Computational Health Sciences Institute, Max, Max Planck Institute, Evolutionary Anthropology Locations: Europe, Ranis, Germany, Africa, Eurasia, Berkeley, Bakar, San Francisco, kůň, Czech Republic, Leipzig, East Asia, Zlatý kůň, archaeogenetics
The Summary Many people have a tiny slice of Neanderthal DNA, evidence of interbreeding between the species and ancient human ancestors. Two new studies suggest that interbreeding occurred during a limited period of time as ancient humans left Africa. How often did ancient humans and Neanderthals interbreed? Studies published in the journals Nature and Science on Thursday suggest that ancient humans and Neanderthals interbred during a limited period of time as the humans left Africa and migrated to new continents. Then the researchers analyzed changes over time in the distribution and length of Neanderthal DNA in those genomes.
Persons: , Johannes Krause, Max Planck, , “ It’s, Priya Moorjani, , that’s, Leonardo Iasi, “ They’re, ” Krause, Martin Frouz, It’s, Joshua Akey, Chris Stringer, Stringer, Akey, ” Akey Organizations: Max, Max Planck Institute, Anthropology, University of California, Evolutionary Anthropology, Anthropology Department, National Museum, Lewis, Sigler, Integrative Genomics, Princeton University, Denisovans Locations: Africa, China, Australia, Europe, Germany, Berkeley, Nature, Ranis, Czechia, Prague, London, Australasia, New Zealand, Papua New Guinea
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