Rattlesnake mating sessions have been known to last more than 22 hours.
232
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
10
Sharks, like other fish, have their reproductive organs in their chests.
248
Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
271
Jellyfish as a species are actually older than dinosaurs and sharks.
383
A giraffe's kick is so powerful that it can decapitate a lion.
216