Francevillian Biota: Early Evidence of Macroscopic Organisms

The Francevillian Biota from Gabon's Francevillian Basin, dated to approximately 2.1 billion years ago, contains possible evidence of early macroscopic organisms. These fossils, found in black shale deposits, include disc-shaped structures up to 17 cm in size with radiating patterns, central bodies, and evidence of flexibility. Their biological nature remains debated, though features suggest organized multicellular structures rather than mineral formations. The specimens appeared shortly after the Great Oxidation Event during increased atmospheric oxygen availability, potentially linking oxygenation to early complex life evolution.