Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
An average cat has 1-8 kittens per litter and can have 2-3 litters per year. During her productive life, one female cat could have more than 100 kittens. A single pair of cats and their kittens can produce as many as 420,000 kittens in just 7 years.
10
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
Bats sleep 18-20 hours per day.
5
Domestic pigs average a top speed of about 11 miles per hour.
182
George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
7
Drivers kill more deer than hunters do.
660
The cat brain weighs about 30g.
167