Why scientists believe Venus could host alien microbial life.

What is the most important step that humanity must take to avoid extinction? According to the late physicist Stephen Hawking, the answer lies far beyo.

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 are due for a visually striking event known as a planetary conjunction this weekend in time with daylight saving.

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