The hole in the soda can tab is actually used to hold a straw in place and stop it from rising.
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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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There's a road in Lancaster, CA that has grooves carved in such a way that when you drive over them at 55 MPH, they will play a part of Rossini's "The William Tell Overture."
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If you place a ripe banana next to a green tomato, the tomato will ripen due to the ethylene gas produced by the banana.
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Some farmers in Kenya are using elephants' natural fear of bees and building "beehive fences" that keep wild elephants from trampling the crops. It keeps the farms safe, and prevents farmers from having to kill elephants to defend their livelihood!
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Brass doorknobs automatically disinfect themselves in about 8 hours.
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