A killer whale's heart beats 30 times a minute under water, 60 times a minute on the surface.
30
The average housefly weighs 10 to 15 millionths of a pound.
33
Spotted skunks do handstands before they spray.
32
The seahorse is the only fish to have a neck.
12
Minnows have teeth in their throat.
21
Human birth control pills work on gorillas.
52
There wasn't a single pony in the Pony Express, just horses!
57