But the biggest development in the seas was the appearance of whales in the mid- to late Paleogene. The huge animals evolved from land mammals that took to the seas. Meanwhile, smaller reptiles ...

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 ...

The humble iguana may have have pulled off an epic migration millions of years ago, traveling from the coast of today’s Mexico to Fiji on rafts made of vegetation.

Mixodectes belonged to an extinct family known as mixodectids and lived during the Paleocene epoch. This geological epoch followed the Cretaceous-Paleogene extinction event that killed off non-avian ...

Some 66 million years after the Chicxulub asteroid impact kickstarted the Cretaceous–Paleogene (K-T) extinction, scientists are still finding stunning evidence of its destruction. In 2021 ...

Today, the fossilized remains of these creatures are buried beneath a conspicuous layer of sediment or rock that geologists call the Cretaceous-Paleogene (K-Pg) boundary. The layer is typically ...

Paleogene-age Wilcox reservoirs extend from onshore to deepwater offshore Gulf of Mexico. Discovery wells delineated the play and oil production from ultradeepwater Wilcox reservoirs began in 2010.