World's Oldest DNA Discovered, Revealing Ancient Arctic Forest Full of Mastodons

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December 08, 2022

Genetics World's Oldest DNA Discovered, Revealing Ancient Arctic Forest Full of Mastodons Two-million-year-old DNA, the world's oldest, reveals that mastodons once roamed forests in Greenland's far northern reaches By Stephanie Pappas

Animals Deep Dive Ties Together Dog Genetics, Brain Physiology and Behavior to Explain Why Collies Are Different from Terriers A way to map the ancestry of dog breeds reveals the genetic basis of stereotypical dog behaviors By Viviane Callier

Genetics DNA from Extinct Human Relative May Have Shaped Modern Papuans' Immune System DNA from Denisovans, an extinct human species, that was found in the genomes of Indigenous Papuans may mold their immune system By Freda Kreier

Sponsor Content Provided by American Committee for the Weizmann Institute of Science This scientist's gut told him to look after yours. Prof. Eran Elinav, a pioneer of microbiome research at the Weizmann Institute of Science, is uncovering the role of the intestinal microbiome in diseases such as diabetes, ALS, and cancer. That takes guts – plus curiosity, dedication, and brilliance.

Robotics Transforming Robots Help to Transfer Skills How do you teach a new robot old tricks? By Matthew Hutson

Archaeology An Archeological Dig in Michigan Turns Up Some Surprising Artifacts Archeologists have found a small mountain of artifacts buried in a farm field that show the presence of some of the first peoples to inhabit the Americas. By Aaron Martin

Conservation Global Summit Tries to Slow Biodiversity Crisis as Species Wink Out around the World Negotiators have gathered in Montreal for a United Nations summit aimed at hammering out a Paris-style agreement to halt and reverse global biodiversity loss by 2030 By Sara Schonhardt,E&E News

Animals 6 Weird and Wild Animal Behaviors Revealed in 2022 Octopus outbursts, evading sexual cannibalism, and a human-cockatoo arms race—here are strange animal behaviors we learned about in 2022 By Andrea Thompson

History What Is a Dog Anyway? Defining what a dog is is really tough, but the domestication of wolves might be the feat that set modern humans on the path to dominance By Pat Shipman

Ecology Global Population Growth Is Slowing Down. Here's One Reason Why In 2022 the world's population hit the eight-billion mark. But such milestones could top out by the end of the century By Katie Peek

FROM THE STORE Scientific American Volume 327, Issue 6

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