In a nutshell A ticking cosmic time bomb lies just 160 light-years from Earth: Astronomers have discovered a rare double ...

Amid growing international chaos, it should come as no surprise that nuclear dangers are increasing. The latest indication is ...

It was the greatest experiment ever conducted on U.S. soil. Discover 20 little-known facts about the Manhattan project.

Atomic clocks are the basis upon which a second is defined. But there is a new kid on the block, the optical clock, which ...