At the time, Earth was populated by dinosaurs, who had been the dominant life form for nearly 200 million years. The Chicxulub impactor is widely thought to have changed all that, leading to the dinosaur’s eventual extinction (and the evolution of surviving dinosaurs into today’s birds).
The impact hypothesis was first proposed to explain this mass extinction (called the Cretaceous–Palaeogene extinction event) by Nobel prize-winning physicist Luis Alvarez and his son Walter Alvarez in the 1970s, but not everyone agrees that the story is so simple. Others think the dinosaurs were already on their way out, a journey accelerated – but not caused – by this visitor from outer space. The asteroid left a crater over 93 miles wide, centered just off the coast of the Yucatán peninsula in Mexico.
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From where exactly were these "facts" derived? From the same idiots that call crude oil "fossil fuels"? And if these "experts" are so smart, wht haven't they deciphered the ancient languages found in the American southwest yet?
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