Before history, Evolution of Life (4560 mya-present), Palaeozoic Era (541-252 mya), Precambrian Superion (4560-541 mya), Proterozoic Eon (2500-541 mya) Evolution of Life, Precambrian Superion: Proterozoic Eon (2500-541 mya), Eukaryotes June 22, 2025 — 0 Comments