Discover the dramatic story behind the Tsar Bomba, the largest nuclear weapon ever detonated. This video explores its Cold ...

A documentary that premiered Thursday at the Sundance Film Festival follows two Utah scientists scrambling to sound the alarm ...

Washington’s allies are looking for a new strategy after a week that has demonstrated what some see as the risks of ...

WASHINGTON, United States — President Donald Trump said a US “armada” was heading toward the Gulf and that Washington was ...

Solar storms are eruptions that release some of the energy stored in the sun's strong magnetic field. These can create ...

From planet-scorching stellar outbursts to cataclysms so powerful they shiver the very fabric of spacetime, these are some of the biggest blasts our cosmos has to offer ...

Japan restarts the world’s largest nuclear power plant, the Trump administration signals a new approach to nuclear waste, and nuclear energy could surpass the declaration to triple capacity ...

Officials said there was no safety issue from the glitch that occurred after TEPCO restarted the No. 6 reactor at the Kashiwazaki-Kariwa plant in north-central Japan.