When our sun becomes a red giant at the end of its life, will it really be able to warm the outer solar system enough for a new burst of life to emerge?

By now, you're probably used to hearing about potentially habitable worlds orbiting other stars. But that "potentially habitable" part may come with more caveats than you might think.

After decades of neglect, space agencies are starting to listen to planetary scientists interested in studying Venus. Here's why they want to explore an alien hellscape.

The oft-cited anthropic principle is a useless tautology.

There's much more to whether a planet is habitable than its distance from a star...