Whales and dolphins can't taste anything other than salt.
11
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
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
A puppy is born blind, deaf, and toothless.
16
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6