Nuclear weapons haven’t been tested in the United States since 1992. Find out why, and what could happen if the hiatus ends.

Two billion years before we made history and split the atom, the Earth had already accomplished it and was running its own ...

Add Yahoo as a preferred source to see more of our stories on Google. Uranium ore. RHJPhtotos/Shutterstock Late last week, Israel targeted three of Iran’s key nuclear facilities – Natanz, Isfahan and ...

Late last week, Israel targeted three of Iran’s key nuclear facilities – Natanz, Isfahan and Fordow – killing several Iranian nuclear scientists. The facilities are heavily fortified and largely ...

Late last week, Israel targeted three of Iran's key nuclear facilities—Natanz, Isfahan and Fordow, killing several Iranian nuclear scientists. The facilities are heavily fortified and largely ...