life in a day

The basic timeline is a 4.5 billion year old Earth,
with (very approximate) dates:
3.8 billion years of simple cells (prokaryotes),
3 billion years of photosynthesis,
2 billion years of complex cells (eukaryotes),
1 billion years of multicellular life,
600 million years of simple animals,
570 million years of arthropods (ancestors of
insects, arachnids and crustaceans),
550 million years of complex animals,
500 million years of fish and proto-
amphibians,
475 million years of land plants,
400 million years of insects and seeds,
360 million years of amphibians,
300 million years of reptiles,
200 million years of mammals,
150 million years of birds,
130 million years of flowers,
65 million years since the non-avian dinosaurs
died out,
2.5 million years since the appearance of the
genus Homo,
200,000 years since humans started looking
like they do today, so incredibly we in compared have been here just 5 minutes!

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