Mass Extinction

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)

World's worst Mass Extinctions

source Futurism