A crocodile cannot stick out its tongue.
1k
Some species of fish have voices!
81
A female ferret will die if it goes into heat and cannot find a mate.
143
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16
Most of a hog's sweat glands are in its snout.
11
Sheep outnumber humans in New Zealand 15 to 1.
33
Dolphins nap with one eye open.
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