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Lush Okavango Delta Pinpointed as Ancestral Homeland of All Living Humans

lundi 28 octobre 2019 par Richard Conniff — The Sciences, Evolution

Genetic evidence traces our origins to a hunter-gatherer community that lived 200,000 years ago, but the study has generated controversy -- Read more on ScientificAmerican.com

Scientific American

What Made Dinos Sore?

dimanche 27 octobre 2019 par Riley Black — The Sciences, Evolution

A new review digs into how the terrible lizards dealt with aches and pains -- Read more on ScientificAmerican.com

Scientific American

Galloping Ant Beats Saharan Heat

mercredi 23 octobre 2019 par Susanne Bard — Environment, The Sciences, Biology, Evolution

The Saharan silver ant feeds on other insects that have died on the hot sands, which it traverses at breakneck (for an ant) speeds. -- Read more on ScientificAmerican.com

Scientific American

Some Mosquito Repellents Act like Invisibility Cloaks

mardi 22 octobre 2019 par Christopher Intagliata — The Sciences, Biology, Chemistry, Evolution

Synthetic repellents such as DEET seem to mask the scent of our “human perfume”—making us less obvious targets for mosquitoes. Christopher Intagliata reports. -- Read more on ScientificAmerican.com

Scientific American

Canada Gets Its First Smilodon

samedi 19 octobre 2019 par Riley Black — The Sciences, Evolution

Fossils found near Medicine Hat, Alberta, expand the saber-tooth cat’s range by more than 600 miles -- Read more on ScientificAmerican.com

Scientific American

Tardigrade Protein Protects DNA from Chemical Attack

mercredi 16 octobre 2019 par Susanne Bard — The Sciences, Biology, Chemistry, Evolution

The Dsup protein protects DNA under conditions that create caustic free radical chemicals. -- Read more on ScientificAmerican.com

Scientific American

Ancient Teeth Reveal Social Stratification Dates Back to Bronze Age Societies

vendredi 11 octobre 2019 par Bret Stetka — Mind, Behavior & Society, The Sciences, Evolution

Humans have a history of status division stretching back at least 4,000 years -- Read more on ScientificAmerican.com

Scientific American

Is Death Reversible?

mardi 8 octobre 2019 par Christof Koch — Features, Mind, Neuroscience, The Sciences, Biology, Evolution

An experiment that partially revived slaughterhouse pig brains raises questions about the precise end point of life -- Read more on ScientificAmerican.com

Scientific American

How Cells Sense Oxygen Levels: Nobel Prize in Physiology or Medicine

mardi 8 octobre 2019 par Steve Mirsky — Health, Medicine, The Body, Wellness, The Sciences, Biology, Chemistry, Evolution

William Kaelin, Jr., Peter Ratcliffe and Gregg Semenza share the 2019 Nobel Prize in Physiology or Medicine “for their discoveries of how cells sense and adapt to oxygen availability.”... -- Read more on ScientificAmerican.com

Scientific American

Nobel in Physiology or Medicine for How Cells Sense Oxygen Levels

lundi 7 octobre 2019 par Steve Mirsky — Health, Medicine, The Body, The Sciences, Biology, Chemistry, Evolution

The 2019 Nobel Prize in Physiology or Medicine goes to William G. Kaelin, Jr., Peter J. Ratcliffe and Gregg L. Semenza “for their discoveries of how cells sense and adapt to oxygen... -- Read more on ScientificAmerican.com

Scientific American