Earth looked much different not just millions, but even decades and centuries ago. Many animal species that once existed are ...

During the Early-Middle Devonian period, a large landmass called Gondwana—which included parts of today's Africa, South America, and Antarctica—was located near the South Pole. Unlike today's icy ...

Deep inside the world’s longest cave system, scientists have uncovered two terrifying extinct predators that once prowled a tropical sea where Kentucky now sits. Entombed for roughly 325 million years ...

Over a million species of animals and plants are now hanging by a thread, more than ever before in human history, says the International Science-Policy Platform on Biodiversity and Ecosystem Services ...

While the average person may believe we’re losing species faster than we can discover new ones, that may not be the case. A ...

(Gary Braasch / Corbis) When Polynesians arrived at the uninhabited Hawaiian Islands thousands of years ago, they found an array of colorful tree snails, each less than an inch in length, across the ...