"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.

Earth Now

http://www.scientificpsychic.com/etc/timeline/timeline.html