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The Antikythera Mechanism - a portable, gears-based device able to predict solar and lunar eclipses decades in advance, including time and aspect, as well as specify the exact position of a planet in real time. Manufactured about 80BC in ancient Greece, possibly commissioned by Archimedes.

This Week at Passing Clouds!

sperm whale says hello - meat eaters, may guilt make you mend your ways.

4 Billion Years Of Evolution in 40 Seconds