Dinosaur extinction theories suggest populations were dwindling when an asteroid wiped them out. New research is challenging ...

It’s fun to imagine secret dinosaur survivors living today, hidden in a remote corner of Earth. But the truth of who made it through the extinction event 66 million years ago may surprise you.

“Dinosaurs were probably not inevitably doomed to extinction at the end of the Mesozoic,” Chiarenza said. “If it weren’t for that asteroid, they might still share this planet with ...

The team suggested a supernova may have stripped the ozone layer ... for the dinosaur extinction when (the) idea was first published in 1980. The supernova idea needs its iridium equivalent ...

dooming the dinosaurs and many other species to extinction.Researchers first identified the cause of the end-Cretaceous extinction by the discovery of the “iridium anomaly” — a 1-centimeter-thick (0.4 ...