Cows can sleep standing up, but they can only dream lying down.
745
Only 3% of bird species have penises.
0
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
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
Jaguars frequently get high by eating hallucinogenic roots, which also increases their senses for hunting.
6