08-11-2018, 03:09 AM
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Senior Member
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Join Date: Mar 2017
Location: ABQ, New Mexico
Posts: 36,633
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Thanked 136,556 Times in 22,784 Posts
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In 1980, the Nobel Prize–winning physicist Luis Alvarez and three colleagues from UC Berkeley announced they had found iridium deposited all over the earth, all in a specific geological time period. This gave birth to their giant asteroid killing off the dinosaurs theory.
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