GEOLOGICAL ERAS

Named after Hades, the Greek god of the underworld, this was Earth's most violent era. Our planet formed from a swirling disk of gas and dust, enduring constant meteor bombardment and a catastrophic collision that created the Moon. The surface was a hellish ocean of molten lava, with no solid ground, no atmosphere, no water - only fire.

The "Ancient Era" marks Earth's transition from a molten hellscape to a world with solid rock and liquid water. More importantly, LIFE appears for the first time - simple single-celled organisms that will eventually transform the entire planet. Volcanic islands dot vast oceans, and the first stable landmasses (cratons) form.

Earth's longest eon witnesses the Great Oxygenation Event - bacteria finally pump enough oxygen into the atmosphere to transform the planet. Supercontinents form and break apart. "Snowball Earth" events freeze the entire planet. And at the end, the first complex multicellular life appears - setting the stage for the Cambrian explosion.

The "Age of Ancient Life" explodes with diversity. The Cambrian Explosion fills the oceans with complex animals in a geological instant. Plants colonize land, followed by insects and vertebrates. Fish evolve jaws. Forests grow. Pangaea forms. And then... the deadliest extinction in history wipes out 96% of all species.

The "Age of Dinosaurs." After the Permian extinction, reptiles rise to dominance. Dinosaurs rule the land for 165 million years. Pangaea breaks apart, creating the Atlantic Ocean and recognizable continents. Flowering plants and birds evolve. Then, 66 million years ago, a city-sized asteroid strikes Mexico, ending the dinosaurs' reign in fire and ice.

The "Age of Mammals." With dinosaurs gone, mammals diversify and dominate. Continents reach their modern positions. India crashes into Asia, raising the Himalayas. Ice ages come and go. And in the last eye-blink of geological time, a clever ape in Africa begins walking upright, making tools, and eventually building rockets to leave the planet.