The most widely accepted theory for dinosaur extinction is that an asteroid or comet wiped them off.
It was the size of a mountain that blasted onto Earth 66 million years ago
It caused creating a massive shockwave and throwing up a huge cloud of dust and debris into the atmosphere
Hence, wiping out the dinosaurs and many other creatures.
Other evidence of the impact has been discovered in the fossil record, such as tsunamis and massive wildfires.
Next: Top 5 Scientists Of Indian Origin At NASA
Find out More..