When cats are happy, they may squeeze their eyes shut.
10
Cows can sleep standing up, but they can only dream lying down.
745
Allegedly, Chrysippus, the Greek philosopher, died of laughter after getting his donkey drunk and watching it try to eat figs.
47
Travis was a chimpanzee who socialized with humans since birth. He could log onto a computer to look at pictures, watch TV using a remote control, brush his teeth, feed hay to his owner's horses, water plants, and learned the schedule of passing ice cream trucks.
11
Two dogs were among the Titanic survivors.
262