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A cat's urine glows under a black light.
In ancient Egypt, killing a cat was a crime punishable by death. See more
The average person spends 2 weeks of it's life waiting for a traffic light to change. See more
A cat has 32 muscles in each ear. See more
The hairs on a polar bear are not white, but clear. They reflect light, so they appear white. See more
The light from your computer screen streams at you at almost 186,000 miles a second. See more
After billions of years, black holes become white holes and they spit out all the things they sucked up. See more
Bees can see ultraviolet light. See more
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