Cats recognise the voice of their owner, but never evolved to care.
22
Sloths take two weeks to digest their food.
243
The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8
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
Ants have tiny magnetic compasses in their antennae which help them navigate.
9
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Squirrels forget where they hide about half of their nuts.
698
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