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Timeline Overview

Billion Years
15 – Big Bang
4.7 – Solar System Sun Planets
4.5 – Earth
4.0 – Liquid Water Rain Protein
3.5 – Bacteria Viruses
3.0 – Oxygen
1.0 – Air

Million Years
500 – Fish
300 – Reptiles Seeds Plants Invertebrates free from water
250 – Dinosaurs
200 – Fruiting Plants Mammals
150 – Birds
050 – Primates Grasses Horses
003 – Recent Ice Age Homo Erectus

Thousand Years
700 – Fire
200 – Neanderthals
100 – People (Homo Sapiens in Africa)
011 – Nomads Farmers
006 – Cities
2.5 – Buddhism
002 – Christianity Roman Empire

Years
550 – Renaissance Colonialism
500 – New World Discovered
450 – Copernicus
350 – Science
250 – Industrial Revolution
060 – Penicillin
050 – DNA Space Exploration Atomic Bomb
030 – The Internet

We don’t know how or why the Universe began.

The Big Bang released radiation particles and atoms. Gravity condensed the atoms into galaxies and stars were created.

Stars created new types of atoms when they grew old and exploded as Supernova. New atoms were released back to the galaxy and formed cosmic dust. New stars like our Sun formed from these, in spirals. The cosmic dust formed planets like Earth.

Life appeared on Earth and evolved into bacteria. Single cells appeared along with plants such as algae and animals like protozoa. The single cells formed colonies which created more complex algae and animals.

Vertebrates such as fish appeared when plants started living on land. Invertebrates appeared soon after. Amphibians evolved and started living on land. Reptiles dominated for millions of years. Flowers, bees and mammals evolved soon after.

Humans appeared on the scene very recently. They dominate the planet.

The Sun will eventually burn up the Earth.

The Universe will end by cooling and expanding into empty space.