there were some fears that a fission bomb could “ignite the atmosphere.” Yes, if you’ve just watched Oppenheimer, read about the Manhattan Project, or looked into atomic weapons at all ...

While Fermi had "discovered" fission, two scientists in Nazi Germany ... This committee was the first government step toward the Manhattan Project. In its first report on Nov. 1, 1939, the ...

The “Manhattan Project” was the codename for the effort ... As the fireball faded, a pillar of “radioactive fission products and weapon residues, water droplets, and larger particles of ...

The Manhattan Project’s challenge was gathering enough ... The H-bomb harnesses the fission reactions’ energy to ignite a nuclear fusion reaction like those that power the sun, creating ...

The Manhattan Project’s leader ... worked in different ways. Fat Man used the fission of plutonium. Little Boy used the fission of uranium-235 to create its awesome and destructive power.

Fission, which was discovered in 1938 ... Laboratory in New Mexico — part of the United States' top-secret Manhattan Project tasked with building the atom bomb. The Manhattan Project took ...

In 1938, when the critical news came from Germany that neutrons make uranium atoms fission (split in two ... The super-secret U.S. atom bomb project was born in the fall of 1939, when President ...

Unsurprisingly, secrecy around the Manhattan Project was intense ... 235 was nicknamed “Little Boy,” which was a gun-shaped fission weapon that exploded over Hiroshima, taking the lives ...

Lise Meitner, who’d been so instrumental in explaining fission in the first place, had turned down an invitation to work on the Manhattan Project, saying, “I will have nothing to do with a ...

The Manhattan Project was a top-secret program to make ... where uranium was enriched until it was radioactive enough for nuclear fission; Hanford, Wash., where reactors transformed uranium ...