Scientists have been arguing about the health risks from radiation since the end of the 19th century, when radioactivity was ...

By World War II, his drive to defeat Germany would propel him to direct the Manhattan Project — the top-secret development of an American atomic bomb — at the Los Alamos Laboratory in New Mexico.

The development of the atomic bomb during the Manhattan Project marked the dawn of a new era. This video takes an in-depth look at how it was accomplished and its lasting impact on the world.

The Doomsday Clock now stands at 89 seconds to midnight, the closest to catastrophe in its nearly eight-decade history.

a group formed by Manhattan Project scientists at the University of Chicago who helped build the atomic bomb but protested using it against people. The time of the clock is currently 89 seconds to ...

The Doomsday Clock, created in 1947 by atomic scientists as a way to keep track of the nuclear threat, is ticking closer to ...