A new kind of time travel based on quantum teleportation gets around the paradoxes that have plagued other time machines, say physicists.
A new cosmology successfully explains the accelerating expansion of the universe without dark energy; but only if the universe has no beginning and no end.
When a hexapod robot challenges a decapod crustacean, who wins?
The best of the rest from the Physics arXiv this week
Devices like the Ozmo2000 will turn everything with a Wi-Fi radio into a direct channel for wireless communication.
Lifetime is key because of the high cost of battery packs.
Social media is particularly useful for anyone who wants to track the present--or predict the future.
A long standing problem of why sperm swim towards surfaces appears to have finally been solved
U.S. military to launch first satellite to snap and relay photos of orbital debris.
A new analysis by Microsoft researcher Danah Boyd argues that Facebook's success is due in part to "white flight" from MySpace.