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The mountains of Saint Francis : discovering the geologic events that shaped our earth

by Alvarez, Walter, 1940-

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Summary

Walter Alvarez and his team made one of the most astonishing scientific discoveries of the twentieth century--that an asteroid smashed into the earth 65 million years ago, exterminating the dinosaurs. Alvarez had the first glimmer of that amazing insight when he noticed something odd in a rock outcr... Full description

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