Only 3% of bird species have penises.
0
Travis was a chimpanzee who socialized with humans since birth. He could log onto a computer to look at pictures, watch TV using a remote control, brush his teeth, feed hay to his owner's horses, water plants, and learned the schedule of passing ice cream trucks.
11
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
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
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
There's a rare breed of pig that looks like a sheep.
14