Brass doorknobs automatically disinfect themselves in about 8 hours.
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Cuban rescue workers use sniffer rabbits to find people in collapsed buildings.
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The largest hotel suite in the world is located 22 stories under the surface in the Grand Canyon Caverns. One night for two people in this 65 million year old cave is $700.
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All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
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Scientists in Germany have developed a candy that doesn't cause cavities.
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Elephants are among the most emotional creatures in the world - they have even been known to rescue other animals, such as trapped dogs.
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