Civilization: The Blink of a Galactic Eye

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milkywayearth

It takes our solar system approximately 240 million years to orbit the Milky Way Galaxy, an event known as a galactic year.

If you went back just one galactic year, then flowers would not yet exist; in fact, you would still have to wait another 100 million years before the first flower bloomed.

 Extinction of the dinosaurs, artwork

Dinosaurs had life pretty good for 135 million years (~½ a galactic year) before an extinction event carved the way forward for mammals and birds to proliferate. Humans have existed for 1/100 of a single galactic year, and agriculture has existed for 0.0000417 galactic years.

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What will the biological diversity of Earth look like when it returns to its current celestial position? Dinosaurs, flowering plants, birds, and mammals had yet to evolve 1 galactic year ago, and the entirety of agricultural history has existed for the equivalent of 22 galactic minutes, or 0.015 galactic days.

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