Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
Condoms were originally made of animal intestines or linen.
347
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
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
Cats recognise the voice of their owner, but never evolved to care.
22
The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8