"The Timeline" Of Everything
Learn About The Earth From Day 1!
Earth In The Beginning
The Precambrian Era (4567 mya)
- Formation of the solar system
- Moon’s orbit is beyond 64,000 km from Earth
- Earth day is 7 hours long
- Earth’s original hydrogen and helium atmosphere escapes Earth’s gravity
- Tidal locking causes one side of the Moon to face the Earth permanently.
Archean Eon (38000 mya)
- Surface of Earth changed from molten to solid rock
- Water starts to condense in liquid form
- Earth day is 15 hours long
- Monocellular life starts
- Sun brightens to 80% of current level
Proterozoic Eon (Siderian Period) 2500 mya
- Stable continents first appear
- First free oxygen is found in the oceans and the atmosphere
- Start of Huronian Ice Age
Proterozoic Eon: Rhyacian Period 2300 mya
- Organisms with mitochondria capable of aerobic respiration appear
- End of Huronian Ice Age
Proterozoic Eon: Orosirian Period (2050 mya)
- Mountain development
- Meteor impact, 300 km crater in Vredefort, South Africa
- Oxygen starts accumulating in the atmosphere
- Meteor impact, 250 km crater in Canada
Proterozoic Eon: Statherian Period: 1800 mya
Complex single-celled life appeared.
Abundant bacteria and archaeans.
Proterozoic Eon: Mesoproterozoic Era: Calymmian Period
Photosynthetic organisms proliferate.
Oxygen builds up in the atmosphere above 10%.
Formation of ozone layer starts blocking ultraviolet radiation from the sun.
Eukaryotic (nucleated) cells appear.