A new study reveals that Earth's biomes changed dramatically in the wake of mass volcanic eruptions 252 million years ago.

Some of the world’s main biomes include rainforest, desert, savannah, grassland, woodland and tundra. Each biome has ... These vast forests store carbon too, but they are threatened by ...

This unleashed a chain reaction: dramatic global warming, oceans starved of oxygen, and a complete destabilization of the planet’s carbon cycle ... to six major biomes, including tropical ...