toxic conditions in marine environments—during the Late Devonian. This research suggests that the expansion of euxinic waters was a significant factor driving mass extinction events, as hydrogen ...

The Ordovician-Silurian mass extinction event may have wiped out some 85 percent of species, including many of the invertebrates this period is known for. Some scientists hypothesize the extinction ...

The Ordovician-Silurian mass extinction event may have wiped out some 85 percent of species, including many of the invertebrates this period is known for. Some scientists hypothesize the extinction ...

The new life burgeoning on land apparently escaped the worst effects of the mass extinction that ended the Devonian. The main victims were marine creatures, with up to 70 percent of species wiped out.

He said asteroids may have contributed to older mass extinction events, like the one during the Late Devonian period. Future research could explain the origins of these asteroid strikes as well.