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Oldest-known stone tools pre-date Homo

Scientists working in the desert badlands of northwestern Kenya have found stone tools dating back 3.3 million years, long before the advent of modern humans, and by far the oldest such artifacts yet discovered. The tools, ...

Is nature mostly a tinkerer or an inventor?

The Krüppel-like factor and specificity protein (KLF/SP) genes are found across many species, ranging from single cell organisms to humans. This gene family has been conserved during evolution, because it plays a vital role ...

Crowdsourced family tree yields new insights about humanity

Thanksgiving gatherings could get bigger —a lot bigger—as science uncovers the familial bonds that bind us. From millions of interconnected online genealogy profiles, researchers have amassed the largest, scientifically-vetted ...

Research shows that sea urchins, sand dollars thrived with time

A new study about echinoids—marine animals like sea urchins and sand dollars—gives scientists a reason to rethink a classical pattern of evolution. Fossil-based studies have traditionally indicated that groups of organisms ...

Research shows fewer males born in U.S. during periods of stress

It is a common understanding in scientific research that the male species, in general, are frailer and experience higher rates of mortality across their lifespans than females. Now, there is evidence that among humans the ...

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