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The extinction of dinosaurs is one of the many periods of mass extinctions on earth. Moravcik

5 periods of mass extinction on Earth. Are we entering the sixth?

Scientists believe since 2010 we have entered the sixth period of mass extinction. CO2 emissions will change the lives of plants and animals in the next three to four decades.
Kayentapus ambrokholohali footprints belong to an animal of about 26 feet long, dwarfing all the life around it. Theropod image adapted by Lara Sciscio, with permission, from an illustration by Scott Hartman

Meet the giant dinosaur that roamed southern Africa 200 million years ago

Until this discovery, theropod dinosaurs were thought to be considerably smaller, at three to five metres in body length, during the Early Jurassic.

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