As the climate cooled and dried following the warming ... 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 ...

An international team of scientists has synchronized key climate records from the Atlantic and Pacific Oceans to unravel the sequence of events during the last million years before the extinction of ...

However, the Cretaceous–Paleogene extinction event was not the ... During this dramatic period of climate change about 252 million years ago, about 80 to 90 percent of all species on Earth ...