How close were the Nazis to developing an atomic bomb? The truth is that National Socialist Germany could not possibly have built a weapon like the atomic bombs dropped on Hiroshima or Nagasaki.

Photo: Atomic bomb test explosion in Alamagordo, New Mexico, July 16, 1945. AP/Wide World Photos In 1932, James Chadwick discovered the neutron, a small atomic particle with mass but no charge.

An curved arrow pointing right. North Korea recently claimed to test a hydrogen bomb. Some experts say it is more likely they tested a "boosted" atomic bomb. Although this type of bomb isn't ...

The museum plans to display those photos in 2025 along with a model of the atomic bomb dropped over Hiroshima, known as Little Boy, according to Jeremy Kinney, associate director of research and ...