Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
The Basenji dog is the only dog that is not able to bark.
4
Squirrels forget where they hide about half of their nuts.
698
The seahorse is the only fish to have a neck.
12
Bats sleep 18-20 hours per day.
5