The lifespan of mammals is about 1 and a half billion heartbeats.
127
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
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
An elephant trunk has no bone but 40,000 muscles.
24
Black Whales are born white.
41