Early American humans hunted car-size armadillos and used their shells for houses.
12
The reindeer is the only mammal that can see UV light.
17
An average cat has 1-8 kittens per litter and can have 2-3 litters per year. During her productive life, one female cat could have more than 100 kittens. A single pair of cats and their kittens can produce as many as 420,000 kittens in just 7 years.
10
Dolphins have names for one another.
18