If a raisin is dropped into a glass of champagne it will bounce up and down in the glass.

Frog-eating bats identify edible frogs from poisonous ones by listening to the mating calls of male frogs. Frogs counter this by hiding and using short, difficult to locate calls.

The speed of light is generally rounded down to 186,000 miles per second. In exact terms it is 299,792,458 m.

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