A planet with twice Earth's gravity produces creatures with different skeletal requirements, different muscular architecture, ...

What if an alien species had a complete evolutionary history stretching billions of years? This deep dive explores the ...

Scientists suggest that advanced aliens might not have physical bodies, challenging traditional views of extraterrestrial ...

A siphonophore—a colonial marine invertebrate related to the venomous stinging Portuguese Man-o-war—is scanned using Deep ...

Alien director Ridley Scott eventually returned to the franchise, but couldn't complete his ambitious plans. Here's what his ...

With the release of Disclosure Day, Steven Spielberg’s new film about aliens, a question as old as science fiction itself resurfaces: if aliens were to arrive on Earth, would they come to conquer us, ...

Theological debates suggest alien encounters might challenge religious traditionalists more than dismantle faith.

What if consciousness isn’t limited to brains like ours? Philosophers Eric Schwitzgebel and Jeremy Pober argue that ...

A biologist specializing in invasive species has partnered with a former Pentagon strategist in pushing NASA to construct a ...

A column by Winona LaDuke, an Ojibwe writer and economist on Minnesota’s White Earth Reservation. She also is co-curator of ...

A mind wrapped in skin and bone can feel like the obvious model for consciousness. But that assumption may say more about where you live than about what consciousness really requires.

A new survey of hundreds of astrobiologists reveals that, despite NASA's high-profile declarations about Mars and exoplanet K2-18b, most experts do not yet think alien life has probably been found.