Since the German physicist Hans Bethe first explained how nuclear fusion powers the stars in 1939, there have been many attempts to harness fusion on Earth - with mixed success. 1946 UK researchers Moses Blackman and George Thomson patent the Z-pinch, which uses powerful pulses of current in parallel conductors to squeeze a plasma and ignite fusion 1952 Following the design of Edward Teller and Stanistaw Ulam, the first H-bomb is ignited by an atom bomb over the Pacific Ocean 1957 Researchers at the Zero Energy.
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