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Neanderthal Gene Still Shapes Muscle and Jaws in Some Living Humans

Velazquez-Arcelay et al. found that genetic material from Neanderthal ancestors may have contributed to the propensity of some people today to be early risers, the sort of people who are more comfortable getting up and going to bed earlier. Image credit: Holger Neumann / Neanderthal Museum.

Neanderthals vanished roughly 42,000 years ago, but a piece of their biology appears to be quietly at work in some people today, according to a new study led by scientists from the Max Planck Institute for Evolutionary Anthropology.

The post Neanderthal Gene Still Shapes Muscle and Jaws in Some Living Humans appeared first on Sci.News: Breaking Science News.

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Study Points to Sugar, Not Just Meat, as Fuel for Human Brain Evolution

Paranthropus boisei. Image credit: Β© Roman Yevseyev.

A team of researchers from the University of Sydney and the University of Glasgow argues that dietary sugars, not animal foods, may have played the decisive role in the expansion of the human brain over the past 4 million years, as hominin brain size grew nearly fivefold, from about 300 grams in early relatives like […]

The post Study Points to Sugar, Not Just Meat, as Fuel for Human Brain Evolution appeared first on Sci.News: Breaking Science News.

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La Brea Tar Pits Yield New Species of Ice Age Toad

Reconstruction of Spea labreae (center and right) in La Brea Tar Pits compared with Spea hammondii (left), the species currently present in the area, and the presence of the Mexican burrowing toad (bottom). Image credit: Arturo DΓ‘valos.

Paleontologists studying the La Brea Tar Pits, one of the world’s richest Ice Age fossil sites, have identified a previously unknown species of spadefoot toad that lived in what is now California during the latest Ice Age.

The post La Brea Tar Pits Yield New Species of Ice Age Toad appeared first on Sci.News: Breaking Science News.

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Tiny New Primate Species Emerges from 50-Million-Year-Old Wyoming Sandstone

Tetonius homunculus (colorized) by R. Bruce Horsfall from W.B. Scott’s History of Land Mammals in the Western Hemisphere.

Paleontologists working in southern Wyoming have identified a previously unknown species of omomyid primate, adding a new chapter to the story of one of the best-studied fossil lineages in North America.

The post Tiny New Primate Species Emerges from 50-Million-Year-Old Wyoming Sandstone appeared first on Sci.News: Breaking Science News.

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244-Million-Year-Old Fossil Preserves Earliest Reptilian Digestive System

Life reconstruction of Austronaga minuta. Image credit: Gabriel Ugueto.

An exquisitely preserved specimen of Austronaga minuta, a small, long-necked marine reptile from the Triassic of China, contains a fossilized stomach, liver and intestines, offering paleontologists their oldest detailed glimpse yet of how early reptiles digested food.

The post 244-Million-Year-Old Fossil Preserves Earliest Reptilian Digestive System appeared first on Sci.News: Breaking Science News.

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Pluto’s Thin Atmosphere May Be Starting to Shrink

According to NASA scientists, complex chemical compounds called tholins give Pluto a distinctive blue haze. Image credit: NASA / Johns Hopkins University Applied Physics Laboratory / Southwest Research Institute.

Pluto’s tenuous atmosphere appears to have begun contracting after years of holding steady, according to a new study published in the Planetary Science Journal.

The post Pluto’s Thin Atmosphere May Be Starting to Shrink appeared first on Sci.News: Breaking Science News.

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