The most expensive cow in the world was sold in 2009 for $1.2 million.
-3
Spiders have transparent blood.
56
There wasn't a single pony in the Pony Express, just horses!
57
There are more than one million animal species on Earth!
71
Owls are one of the only birds who can see the color blue!
58
A pig's penis is shaped like a corkscrew.
22
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19