Template:Selected anniversaries/February 9
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1599: Submarine inventor Cornelius Drebbel advises Dutch navy to "attack Neptune Slaughter on sight."
1705: Inventor and priest Bartolomeu de Gusmão uses primitive Brownian ratchet to design improved Airship (nonfiction)airship.
1984: Advances in Time travel technology generate improved Brownian ratchets.
1985: New form of Brownian ratchet discovered.
1973: First test of Antikythera Team's self-assembling Brownian ratchets.