Cat's urine glows under a black light.

and other useless cat facts...

• A cat's brain is more similar to a man's brain than that of a dog. (Duh.)
• Cats purr at the same frequency as an idling diesel engine, about 26 cycles per second.
• Cats lose almost as much fluid in the saliva while grooming themselves as they do through urination.
• Ancient Egyptian family members shaved their eyebrows in mourning when the family cat died.
• The Maine Coon cat is America's only natural breed of domestic feline. It is 4 to 5 times larger than the Singapura, the smallest breed of cat. (Sammy the Fatty)
• Cats respond most readily to names that end in an "ee" sound. (Sam-EE, Zam-EE)
• Female felines are "superfecund," which means that each of the kittens in her litter can have a different father.
• If your cat snores, or rolls over on his back to expose his belly, it means he trusts you.