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 ...
Dinosaur Discovery on MSN
The Paleozoic Era; Life Before the Dinosaurs
The dinosaurs first appeared on Planet Earth around two hundred and forty five million years ago. That's a staggeringly long ...
Dinosaurs appear to have been thriving before a giant asteroid hit the Earth 66 million years ago, paleontologists working in ...
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