By Olga Symeonoglou
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| "North Korea - Pyongyang" by stephan is licensed under CC BY 4.0 |
Hydrogen (or thermonuclear) bombs are far more
powerful than atomic bombs. Atomic bombs create energy through fission
(atoms splitting in half), while hydrogen bombs use the energy released from atomic
fission to spark fusion (atoms fusing together). Only the United States,
Russia, China, France, and Britain are known
to have tested hydrogen bombs.
