Our best models of the cosmos don't add up — but that could change if the universe is actually made of a viscous 'fluid,' a ...

There may be an infinite amount of energy locked in the vacuum of space-time. So could we ever harness this energy for anything useful? The idea of vacuum energy comes from quantum field theory, which ...

During a spacewalk outside the International Space Station, Russian cosmonaut Sergey Prokopyev jettisoned a 5-kilogram bundle ...

If ever spotted in the emptiness of space, according to theoretical physicist Eugeny Babichev of the University of ...

The coldest and densest molecular gas clouds in the interstellar medium can have temperatures of 10 K (-505 °F/-263 °C), ...