History ❯Earth History

Geological Periods

Paleozoic Era Cryogenian

Ancient Glaciers Shaped Earth's Oceans, Boosting Evolution of Complex Life

New research reveals how massive glaciations 700 million years ago altered ocean chemistry, paving the way for multicellular organisms.

Earliest Evidence of Coral-Algae Symbiosis Discovered in 385-Million-Year-Old Fossils