Earth is believed to have experienced its most severe ice age around 700 million years ago, which left behind geological ...

Ancient migration between wild horse populations in America and Asia show how ecosystems adapt to survive cataclysmic change — strategies that modern forms of conservation may unintentionally hinder.

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 ...