He showed that if you go out into space and travel near the speed of light, and you turn around ... past does make use of a weird concept called wormholes. A wormhole is something that really ...

There are very few options for us if the speed-of-light barrier is not broken," says Halpern, an associate professor at the Philadelphia College of Pharmacy and Science and author of the forthcoming ...

New research suggests that extreme objects known as "kugelblitze" — black holes formed solely from light — are impossible ... warp drive or traversable wormholes." ...