Part 4/7:

11:35 AM: Oxygen Surges into the Atmosphere

By 11:35 AM, cyanobacteria begin to produce oxygen through photosynthesis, leading to the Great Oxygenation Event, which transforms the composition of the Earth's atmosphere.

1:39 PM: Shift to Oxygen-Based Life

Life transitions to utilizing oxygen as a primary energy source, leading to a more complex biological world where eukaryotic cells emerge.

The Cambrian and Beyond

8:34 PM: The Cambrian Explosion

Around 8:34 PM, we witness the Cambrian Explosion, a rapid diversification in life forms. Organisms with hard body parts like trilobites start to dominate the seas.

9:34 PM: Life Moves onto Land