The fossils embedded in this road cut suggest ... spilling into shallow water as sea levels rose and smothering marine life. Permian oceans also might have been poisoned with CO2, according ...

Piero Leonardi first described the 280-million-year-old Permian fossil in 1959 ... in Morocco has shed light on a mysterious ancient marine predator, Carinodens acrodon, a small but highly ...

The most devastating of these was the Permian-Triassic extinction event ... often in association with other marine fossils from the same time period. However, be mindful — not all areas allow ...

These familiar marine ... Permian extinctions about 250 million years ago. Photograph by James L. Amos The iconic arthropods of the Cambrian were the trilobites, which left a huge number of fossils.

During the Permian, gorgonopsians shared their habitat with herbivorous reptiles such as captorhinids. The latter, often smaller, represented ideal prey for these fast and well-equipped apex predators ...

The mass extinction at the end of the Permian (about 252 million years ago ... an early relative of mammals whose fossils are known from Russia, China, India, Africa and Antarctica.