Why scientists believe Venus could host alien microbial life.

He warns that as long as humans remain confined to Earth, the species will always remain vulnerable to extinction from global catastrophe. Scientists estimate that at least five mass extinctions have ...

Venus and Saturn are due up for a visually striking event known as a planetary conjunction. Here's everything to know about when and how to see it.

Venus and Saturn will appear close together in the night sky Sunday, March 8. Here's how to see the conjunction from around Arizona.