History of Earth by B Leary_11

Formation of the Solar System – ~4.6 billion years ago

bleary112 — 2025-10-06 12:22:04 UTC

The Major event that took place is that all the plant start to form and take shape.

Formation of the Earth Crust & Ocean – ~4.4 billion years ago

bleary112 — 2025-10-06 12:25:20 UTC

The Major event that took place the plant crust started to form. Young Earth started to become a planet with a solid surface and liquid water

Oldest Geological Evidence (rocks, microfossils) – ~3.8–4.0 billion years ago

bleary112 — 2025-10-06 12:34:54 UTC

The Major Event that took place is that there were early signs of physical and chemical evidence of Earth’s crust and the first possible traces of life.

Proliferation of Cyanobacteria (oxygenic photosynthesis, Great Oxidation Event) – ~2.5–2.7 billion years ago

bleary112 — 2025-10-06 12:51:15 UTC

The Major Event that took place was that a mass amount of oxygen was released into the the atmosphere

Evolution of Prokaryotic cells – ~3.5–3.8 billion years ago

bleary112 — 2025-10-06 13:57:22 UTC

The Major Event that took place was that the first sign of Prokaryotic cells showed up on Earth.

Evolution of Eukaryotic cells – ~1.8–2.0 billion years ago

bleary112 — 2025-10-06 14:00:15 UTC

The Major event that took place was that Eukaryotic cells developed a nucleus, membrane-bound organelles, and a larger, more complex structure.

Evolution of Multicellular organisms – ~1.2 billion years ago

bleary112 — 2025-10-06 14:03:03 UTC

The Major Event that took was that single-celled eukaryotic began to join and cooperate.

Cambrian Explosion – ~541 million years ago

bleary112 — 2025-10-06 14:54:03 UTC

This was a major event because either was the first time there was dramatic increase in the diversity of animal life.

Dinosaurs – ~230–65 million years ago

bleary112 — 2025-10-06 14:55:25 UTC

This was a major event because dinosaurs are one of the most famous animals to have gone exist from earth.

Appearance of Modern humans (Homo sapiens) – ~200,000–300,000 years ago

bleary112 — 2025-10-06 14:58:06 UTC

The Major event that took place was that this was a milestone for evolution due to the fact that humans had modern traits such as