Dogs have been man's pet for over 14,000 years.
224
When dragonflies mate, their tails form a love heart.
22
Female kangaroos have three vaginas.
2
Bats sleep 18-20 hours per day.
5
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
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12