Picture this: you walk outside and into your yard and discover a strange metal sphere that’s a little smaller than a bowling ball (a diameter of eight inches), but a solid eight pounds heavier than ...

The best way to find alien technosignatures is to look for ones that have long survived their creators, according to a new paper.

Add Yahoo as a preferred source to see more of our stories on Google. Some still question the origins of the strange steel ball that a Florida family found on their property in 1974. Could it be alien ...