Add Yahoo as a preferred source to see more of our stories on Google. Credit: Shutterstock "Warp drives" used by super-advanced alien civilizations may create specific space-time ripples in their wake ...

To construct a warp drive, we'd need 10 times more negative energy than all of the positive energy in the universe. When you purchase through links on our site, we may earn an affiliate commission.

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? On one particular Friday night in 1992, Miguel Alcubierre couldn’t stop thinking ...

A new paper suggests that we may be able to spot alien spaceships hopping between distant stars using "warp drives" because the sci-fi-inspired technology would give off specific gravitational waves ...