List of extinction events
An extinction event is a relatively fast drop in the number of species living on Earth. It occurs when the rate of extinction increases more than the rate of speciation. This is a list of the largest. Major extinction events are important to both geology and evolution.
The Phanerozoic change
Other extinction events in the Phanerozoic had significant impact on the evolution of the biota. Overall, it seems that climate changes caused some extinctions, and hits by asteroids sometimes caused extinctions.
- The formation of the moon by a planet-sized body striking the Earth would probably have eliminated any early forms of life.
- Pre-Palaeozoic ice ages would have been extinction events. They were:
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