New Study Pushes Back Origin of Complex Life to 2.1 Billion Years Ago

Evidence from the Franceville Basin suggests complex organisms evolved much earlier than previously believed.

Researchers discovered macrofossils in Gabon's Franceville Basin dating back 2.1 billion years.
The study links the emergence of these organisms to increased phosphorus and oxygen levels from underwater volcanic activity.
This discovery challenges the established timeline that complex life first appeared 635 million years ago.
The findings propose a two-step evolution of complex life, with an initial attempt 2.1 billion years ago and a successful spread 1.5 billion years later.
Some scientists call for more evidence to fully support these new claims.