"Studying the rate at which galaxies formed lets us directly test our theories and, so far, we’re lining up with what general ...

President Vladimir Putin on Tuesday formally lowered the threshold for Russia’s use of its nuclear weapons, a move that ...

A handful of startups are racing to usher in an era of near-limitless fusion energy, but big questions remain.

Engineers from China have surmounted obstacles and built a system consisting of seven emitting devices and their experimental firings have confirmed that it can effectively suppress signals of the US ...