A new study reveals that Earth's biomes changed dramatically in the wake of mass volcanic eruptions 252 million years ago.

About 250 million years ago, at the end of the Permian period, something killed some 90 percent of the planet's species. Less than 5 percent of the animal species in the seas survived. On land ...

These familiar marine arthropods first arose about 545 million years ago in the early Cambrian and thrived ... the mega-extinction that ended the Permian period 251 million years ago.

About 250 million years ago during the Early Triassic ... of body sizes that they did during the earlier days of the Permian period. Some of the temnospondyls were small and fed on insects ...

Some areas in the Permian have hit geological limits while others, yet to be drilled, are not expected to be as prolific as ...

The Triassic Period was a time of great change. Bookended by extinctions, this era saw huge shifts in the diversity and dominance of life on Earth, ushering in the appearance of many well-known groups ...

The Early Permian dissorophid Cacops displays its fearsome dentition ... researchers examined about 100 of their fossils from throughout that period. They measured the fossils’ body size, skull shape, ...

The end-Permian mass extinction ... extinction rate during the same period. This conclusion was based on the discovery of ...

"While fossilized spores and pollen of plants from the Early Triassic do not ... The earliest periods, in the Permian, were cold, while the first period of the Triassic—the Induan—had a ...

The Permian period’s mass extinction had wiped out ... marine reptiles such as the plesiosaurs were kings. Plesiosaurus, an early plesiosaur, was about 4.5 metres long with a broad, flat body ...