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Death Valley Scotty would check out for a few days of wandering in the nearby Grapevine Mountains, bringing back suspiciously refined-looking gold that he claimed he had prospected.
When it decays to stable nickel, it emits two relatively high-energy gamma rays.
The caves contain mummies of men and animals and implements of a culture 80,000 years old but, Professional archaeologists were skeptical of Hill's story.
Los Angeles County Museum scientists pointed out that dinosaurs and tigers which Hill said lay side by side in the caves appeared on Earth 10,000,000 to 13,000,000 years apart.
By the late 1970s, nuclear power had suffered a remarkable international destabilization, as it was faced with economic difficulties and widespread public opposition, coming to a head with the Three Mile Island accident in 1979, and the Chernobyl disaster in 1986, both of which adversely affected the nuclear power industry for many decades.
In 1901, Frederick Soddy and Ernest Rutherford discovered that radioactivity was part of the process by which atoms changed from one kind to another, involving the release of energy.