The chances of intelligent life emerging in our universe—and in any hypothetical ones beyond it—can be estimated by a new ...

An analysis looking at the hand bones of australopithecines, apes and humans reveals that tool use likely evolved before the ...

"The findings not only provide further evidence to support the theory of a Martian ocean but also present, for the first time ...

Human societies have long depended on the division of labor to thrive—walk into any town, and you can probably find bakers ...

If another gravity theory is correct, "then the broader implications are enormous," astrophysicist Stacy McGaugh told ...

Earth’s warming could trigger sweeping changes in the natural world that would be hard, if not impossible, to reverse. At the U.N. climate conference in Azerbaijan, world leaders are gathered in ...