What were the earliest known organisms like, and when did they ... | Filo

The timeline of early life on Earth is debated, with the earliest irrefutable evidence of life dating to about 2.7 to 3.5 billion years ago, while some scientists suggest life may have originated as early as 3.7 to 4.5 billion years ago. Scientists use fossil evidence and chemical signatures to date the origins of life, but the record is complicated by the way Earth's ancient rocks have been weathered and recycled over billions of years. | Space Advances

Diverse life forms may have evolved earlier than previously thought

Fossils and rock layers

The oldest fossils of our species just got older

Origins of Life on Earth - Biology Online Tutorial

This May Be the Oldest Known Sign of Life on Earth