Hadean Period

The Hadean eon represents Earth's earliest history—a time of violent transformation and cosmic bombardment that laid the foundation for all life to come.

During this tumultuous period, our planet was defined by its molten surface, frequent meteorite impacts, and the gradual formation of the first rocks and oceans. The atmosphere consisted primarily of water vapor, carbon dioxide, and nitrogen, with no free oxygen to support life as we know it.

Perhaps the most dramatic event of the Hadean was the formation of the Moon, likely resulting from a catastrophic collision between Earth and a Mars-sized object called Theia. This impact fundamentally shaped our planet's future.

The Hadean set the stage for everything that followed—without this violent beginning, Earth would never have become the cradle of life we know today.