Single-Cell Smackdown: The Battle for Earth's Early Oceans
When you buy through links on our site , we may garner an affiliate mission . Here ’s how it works . Stromatolites ruled the fossil disk for 2 billion year . The squishy , embarrassing mound of communal - living microbes dominated shallow - piddle environment everywhere on Earth during life ’s early days . Then , long before algae - munch animals appeared 550 million year ago , stromatolites mysteriously plummet in number ....