The universe is roughly 13.8 billions years old.
The universe was 66% of its current age by the time the Sun and Earth formed.
Life appears to have begun on Earth when it was around 10% of its current age of around 4.5 billion years.
The Earth was 85% of its current age before the first complex animals evolved.
It was 98% of its current age before the first primates appeared.
It was 99.9% of its current age before primitive humans evolved.
It was 99.99% of its current age before anatomically modern humans appeared.
Anatomically modern humans have spent 95% of our time on this planet living as small roaming bands of hunter-gatherers.
Civilization, all the empires of history, all the known cultural, religious, and philosophical movements, all the wars and dramas of recorded history, have happened within the last 2.5% of the time of modern humans, and…
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