Conscience

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And you thought you were able to get rid of that pesky mosquito buzzing by your ear.

The part of the mosquito's wing pictured above, is what makes the buzzing or whining sound. The comb-like half, shown in blue, scrapes against the part shown in yellow, whenever the mosquito flaps its wings. Illustration from "On a Possible Stridulating Organ in the Mosquito," in the public domain

- Ariel Murphy