A decapitated planarian flatworm grows a new brain complete with all its old memories.
The cigarette snail is so called because a bite from its venomous tooth leaves you just enough time to smoke a cigarette before you die.
Spiders can survive for hours underwater by entering a self-induced coma.
It takes a male flea six to eight hours to unfold all the different parts of its penis.
Moths can be trained to detect plastic explosives.
Wasps can recognize each other’s faces.
Locust swarms move so fast because each locust is trying to eat the one in front and avoid being eaten by the one behind.
Slugs dislike copper; their slime reacts with it and gives them an electric shock.
Spiders recycle their webs by eating them.
Bees can count to four.
Taken from: 1,339 Quite Interesting Facts to Make Your Jaw Drop, by John Lloyd, John Mitchinson, and James Harkin.