Smithsonian Magazine on MSN
The Dinosaurs of North America Were Thriving Up Until an Asteroid Wiped Them Off the Face of the Earth, Scientists Argue
A new study of dinosaur biodiversity challenges the belief that the megafauna were on their way out 66 million years ago ...
However, when the asteroid slammed into Earth, it carried with it a payload of the element, which settled over much of the planet in a fine layer. The iridium-rich layer of sediment, which defines the ...
A Mount Everest–sized asteroid wiped out the dinosaurs, triggering global wildfires, tsunamis, and a nuclear winter before ...
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