In 1995, a pair of scientists discovered a planet outside our solar system orbiting a solar-type star. Since that finding—which won the scientists a portion of the 2019 Nobel Prize in ...

For generations, science fiction has imagined what life might look like on other worlds. These aliens are fictional, sure, but some of them are informed by real evolutionary processes on Earth. That's ...

This file argues that the biggest obstacle in the alien debate may no longer be the total lack of evidence, but the impossible standard for what counts as final proof. From the Wow! signal to Martian ...