Beginnings, Evolution of Life (4600 mya-Present), Palaeozoic Era (541-252 mya), Phanerozoic Eon (541 mya-Present), Silurian Period (444-419 mya), jawed fish Beginnings, Evolution of Life: Silurian Period (444-419 mya), jawed fish June 21, 2025 — 0 Comments