Extinction event

An extinction event is a period in time when a large number of species have died out.

225 million years ago, in the transition from the Permian period to the Triassic, 90-95% of all marine species died out.

195 million years ago, in the transition from the Triassic period to the Jurassic, there was another extinction event.

65 million years ago, the Cretaceous-Tertiary extinction event killed about 50% of all species died out, including the dinosaurs.

Some people claim that we are living in the middle of another, man-made extinction event right now.

See also

• Extinct birds