For many years, climate change was the most credible explanation for the dinosaurs’ demise.
Dinosaurs thrived in the planet’s consistently humid, tropical climate.
But in the late Mesozoic Era that corresponds with the extinction of the dinosaurs, evidence shows that the planet slowly became cooler.
What caused the extinction of the dinosaurs?
As originally proposed in 1980 by a team of scientists led by Luis Alvarez and his son Walter Alvarez, it is now generally thought that the K–Pg extinction was caused by the impact of a massive comet or asteroid 10 to 15 km (6 to 9 mi) wide, 66 million years ago, which devastated the global environment, mainly through
When did dinosaurs become extinct and why?
When did dinosaurs become extinct? Dinosaurs went extinct about 65 million years ago (at the end of the Cretaceous Period), after living on Earth for about 165 million years.
Are Dinosaurs Really Extinct?
As such, birds were the only dinosaur lineage to survive the Cretaceous–Paleogene extinction event 66 million years ago. Dinosaurs can therefore be divided into avian dinosaurs, or birds; and non-avian dinosaurs, which are all dinosaurs other than birds.
Why did dinosaurs go extinct but not mammals?
“It was the huge amount of thermal heat released by the meteor strike that was the main cause of the K/T extinction.” He said underground burrows and aquatic environments protected small mammals from the brief but drastic rise in temperature.