When the Americans tried to detect radiation from Soviet bombs, they in fact discovered gamma ray bursts - radiation from deep space.
- During the Cold War, the US suspected the Soviets of testing nuclear bombs on the dark side of the moon.
- In 1967, satellites built to detect nuclear weapons picked up a powerful radiation signal from deep in space.
- When massive stars die they form black holes, sending out great jets of high-frequency radiation called gamma rays.
- The most distant gamma ray burst discovered so far took place 13 billion light years away.
"Attention all bases. Attention all bases. This is Iron Hand. This is Iron Hand."
The Cold War was the name for the rivalry between the United States of America and the Soviet Union that developed after the Second World War.
The Cold War
This conflict led to an unexpected and extraordinary discovery.
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