History ❯ Earth History

Geological Time Scale

Mass Extinction Events Cretaceous Period Permian Period Devonian Period Triassic Period Magnetic Pole Reversals Miocene Epoch Cryogenian Events Paleoarchean Era Ancient Earth Archean Eon Supercontinents Planetary Formation Gondwana Formation of Earth Mesozoic Era Early Earth Cryogenian Period Mesoproterozoic Era Mass Extinctions Archaean Eon

Ancient Salt Yields First Direct Mesoproterozoic CO2, Indicating a Mild 1.4-Billion-Year Climate

Custom corrections on halite inclusions enabled the first robust CO2 readings from this era.

Ancient Mantle Rocks Reveal Potassium-40 Deficit Linked to Surviving Proto‑Earth

Earth’s Oldest Intact Rocks Confirmed at 4.16 Billion Years in Quebec

Ancient River-Carved Terrain Discovered Beneath East Antarctic Ice