Five are the worst known Mass Extinctions. Take a look at the infographic…
Top Five Extinctions
Cambrian Explosion: Early life-forms began to flourish. (540 million years ago)
Ordovician-silurian Extinction: Small marine organisms died out. (440 mya)
Devonian Extinction: Many tropical marine species went extinct. (365 mya)
Permian-triassic Extinction: The largest mass extinction event in Earth’s history affected a range of species, including many vertebrates. (250 mya)
Triassic-jurassic Extinction: The extinction of other vertebrate species on land allowed dinosaurs to flourish. (210 mya)
Cretaceous-tertiary Extinction: (65.5 mya)
source Futurism
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