The Mesozoic Era extinctions formed the world as we know it today. Read about what caused them and which animals survived.

Small fossils show mammals moved to the ground before the dinosaurs vanished. New plants changed habitats, giving better food ...

Researchers suggest that ground-based mammals fared better than their arboreal relatives during the end-Cretaceous extinction ...

While some animals, like birds ... Following the Cretaceous-Paleogene extinction event, mammals rapidly diversified into niches previously occupied by dinosaurs, leading to more diverse melanosome ...

It comes after the Jurassic Period and before the Paleogene - the first period of the ... released would have cooled the atmosphere. The Cretaceous extinction wiped out about 65% of all species. The ...

The anatomy of the animal's limbs and claws indicate that ... the geological epoch that followed the Cretaceous-Paleogene extinction event that killed off non-avian dinosaurs 66 million years ...

The so-called Cretaceous-Paleogene extinction (or K-Pg ... insurmountable barrier to survival. While this extinction ...

Along with sharks, many of these now-extinct species may have feasted on bottom-dwelling crustaceans ... layer of sediment or rock that geologists call the Cretaceous-Paleogene (K-Pg) boundary. The ...

“A nocturnal lifestyle may have enabled these species to avoid predation by ... and diversification after the Cretaceous-Paleogene extinction.” Researchers believe that the high melanin ...