It was a normal day in the Cretaceous—then an asteroid hit the planet. Riley Black's new book explores how the extinction of dinosaurs gave way to new life.
by Riley Black. Copyright © 2022 by Riley Black and reprinted by permission of St. Martin’s Publishing Group.
Picture yourself in the Cretaceous period. It’s a day like most any other, a sunny afternoon in the Hell Creek of ancient Montana about 66 million years ago. The ground is a bit mushy, a fetid muck saturated from recent rains that caused a nearby floodplain stream to overrun its banks. If you didn’t know any better, you might think you were wading on the edge of a Gulf Coast swamp on a midsummer day.
The non-avian dinosaurs won’t be the only creatures to be so harshly cut back. The great, batwinged pterosaurs, some with the same stature as a giraffe, will die. Fliers like, with a wingspan wider than a Cessna and capable of circumnavigating the globe, will disappear just as quickly as the non-avian dinosaurs.
But the reason we’ve gone back to this place and this one infamous moment is to understand not only why there are nodescendants at the zoo but also how and why we came to exist. The Age of Mammals, a marker literally set down in stone, would never have dawned if this impact hadn’t allowed for evolutionary opportunities that were closed for the previous 100 million years. The history of life on Earth was irrevocably changed according to a simple phenomenon called.
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