Only 3% of bird species have penises.
0
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
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
Tigers can see 6 times better at night than humans.
305
Cows can sleep standing up, but they can only dream lying down.
745