Crocodile babies don't have sex chromosomes; the temperature at which the egg develops determines gender.
45
Penguins can convert salt water into fresh water.
97
A rodent's teeth never stop growing.
16
Black bears are not always black. They can be brown, cinnamon, yellow, and sometimes white.
32
Turtles can live for more than 100 years.
84
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
The original name for the butterfly was 'flutterby'!
121
Dogs have four toes on their hind feet, and five on their front feet.
179