DEVONIAN

419-358 MYA

The Time When Plants Grows Rapidly, Ends with Second Mass Extinction

Given that the mass extinction took place over a huge span of time—estimates range from 500,000 to 25 million years—it isn’t possible to point to a single cause for the Devonian extinction, though some suggest that the amazing spread of plant life on land during this time may have changed the environment in ways that made life harder, and eventually impossible, for the species that died out.