The New START treaty is due to expire in three weeks, and President Donald Trump has not formally responded to the offer that ...

At a crucial moment for climate change, these technologies show us where we're heading. Happy New Year! I know it’s a bit late to say, but it never quite feels like the year has started until the new ...

If dark stars existed, they would have been capable of forming in the universe before ordinary stars could have formed. When ...

The US president does not rule out military action in Iran, as Tehran temporarily shuts its airspace to nearly all flights.

By introducing its first Kilo-class sub in 1980, the Soviet Union was entering a new phase of diesel-electric submarine ...