The scientific wonderers at What If examine speculative evidence suggesting humanity may have already made contact with intelligent extraterrestrial civilizations.

Neil deGrasse Tyson is an astrophysicist who is the director of the Hayden Planetarium at the American Museum of Natural ...

If Project Hail Mary left you craving more space adventures, these 15 books deliver just that.

When you're looking for signs of extraterrestrial intelligence, it helps to know what you're looking for and to go about it ...

Physicist Richard Feynman argued that fundamental limits of physics, biology, and time make interstellar contact between ...

As a mathematician—and given the recent buzz over UFO disclosures—I find myself entertained by a specific hypothetical: If a ...

And when people are convinced that they know a secret, world-shaking truth, they are willing to wait a long time for ...

In one possible timeline, the advent of A.I. is widely understood as a win for atheism and a blow against religious ideas of ...

We are all philosophers, which simply means we all have opinions and worldviews about most everything. Since the birth of the ...

Explore the 150-year history of Pandora with our guide to James Cameron’s Avatar. From Na'vi biology to RDA technology, see ...