Despite seeming like a relatively stable place, the Earth's surface has changed dramatically over the past 4.6 billion years. Mountains have been built and eroded, continents and oceans have moved ...

Far below the surface of Mexico’s Yucatán Peninsula, a flooded labyrinth of limestone tunnels has quietly guarded one of the most haunting fossil troves of the Ice Age. In the darkness of a submerged ...

The 470-mile-long Greenlink West transmission line could cut across a Nevada national monument that preserves the fossils of long-extinct species like the Columbian mammoth. That’s slowed down a ...

If you grab the ancient musk ox by the horns, you just might find a new genus and species. A New Mexico fossil has been determined to be a new genus and species of an ice age relative of the musk ox.