Ancient climate

Discoveries Extinct ice age toad found at La Brea Tar Pits rewriting Los Angeles’ climate history

Decades-old fossils reveal a new toad species and a Mexican burrowing toad far beyond its modern range.

Green Impact Study reveals hidden role of permafrost in ancient climate change Joshua Shavit

Green Impact The lost inland sea that dwarfed the Great Lakes and reshaped North America Rebecca Shavit