1. Cats have between 20/100 and 20/20 vision at close range. They can see black, white, various shades of gray, blue, green, and yellow, but not red. Their vision is sharpest at 2 to 3 feet.

2. A cat up to 3 feet away from the origin of a sound can pinpoint its location to within a few inches in 0.6 seconds. They can do this by rotating their satellite-dish ears 180 degrees to funnel sound into the ear canal.

3. A cat's sense of smell is keen. Its olfactory membrane is about 14 square centimeters compared to 4 square centimeters in humans.

4. The rich nerve endings of whiskers register very small changes in air pressure, enabling cats to move adeptly in the dark. Whiskers are twice as thick as hairs, and are three times deeper.

5. When cats rub on objects or people, they are "marking" them with pheromones. These are released from tiny glands located all over the cat's body, including around the mouth and in between their toes!