Add Yahoo as a preferred source to see more of our stories on Google. "If you found out we weren't alone, if someone showed you, proved it to you, would that frighten you?" the official logline reads.

Sagan's team created the greatest puzzle of all time, which you can only solve if your species understands the basic nature of the universe.

Dive into some of the most horrifying and entertaining films of the 1970s with this collection of must-watch alien invasion ...

For decades, SETI searched the skies for a clear alien message, a beacon, or a cosmic “hello.” But this video argues the real mistake may have been expecting aliens to communicate like humans. A ...