History of the Earth

Planetary Accretion 4.6 billion years ago.

4 BCE

Gravity pulls dusts into tiny rocks, and over millions of years, gravity has pulled in these rocks to form the Earth.

Theia collides with the Earth 4.5 billion years ago

4 BCE

Both planets turn to liquid. Gravity pulls the debris to form a red hot ring that circles the Earth.

Planetary Cooling 4-3.8 billion years ago

4 BCE

4-3.8 billion years ago, volcanic eruptions contained magma, after the magma hardened, Earth became cooled and formed a crust.

Formation of the Moon 4.5 billion years ago

4 BCE

In the ring that circles the Earth, a ball formed, and that is our moon.

End of Heavy Bombardment 3.8 billion years ago

3 BCE

Failed planets and smaller asteroids slammed into larger worlds, scarring their surface. Comets that contained water in them, and that brought H2O on to Earth. These comets might be materials flung from the early motions of Uranus and Neptune.

Origin of Life on Earth 3.5 billion years ago

3 BCE

Core formation 1.5 billion years ago.

1 BCE

The core formed during accretion, as metal from impactors sank through a magma ocean to the center of the Earth.