Posted on 11/28/2006 7:50:28 PM PST by Al Simmons
I remember when I first heard Dr. Alvarez's theory back in 1981.
Instantly I KNEW it made sense. There is just NO WAY that a species that dominated every single niche of earth's ecosystem for 160 MY vanishes in a fortnight absent an apocalypse....
How We Proved An Asteroid Wiped Out The Dinosaurs
Geologist Walter Alvarez gets to the bottom of a scientific murder mystery. Created by Big History Project.
https://www.khanacademy.org/partner-content/big-history-project/life/how-did-life-begin-change/v/bhp-proved-asteroid-wiped-out-dinos
https://www.youtube.com/watch?v=YRDpPeKc-ZE
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