Stories

Algae triggered the evolution of first animals on Earth

Associated Press

Scientists in Australia believe they've solved the mystery of when and how animals first appeared on Earth: it was linked to the rise of algae, preceded by 50 million years of huge glaciers pounding entire mountain ranges into powder.

"These large and nutritious organisms at the base of the food web provided the burst of energy required for the evolution of complex ecosystems, where increasingly large and complex animals, including humans, could thrive on Earth," said the lead researcher, Jochan Brocks.

Why it matters: Understanding the conditions that led to complex life here could help to determine whether and how live evolved elsewhere in the universe.