Each firework is packed with just the right mix of chemicals to create their colorful lights.
Among the top questions baffling art enthusiasts is the elusive grin. Did da Vinci intentionally create the ambiguous appearance?
If the surface of your skin gets too chilly, the brain sets into motion a series of warming tricks such as shivering.
Nearly a century ago, after someone realized that a scuffed-up ball travels farther than a shiny new one, balls gained dimples.
Over millions of years in an oxygen-deprived environment, minerals crystallize within the wood's cellular structure, forming the stone-like material known as petrified wood.
Gas released by sliced onions mixes with the liquid in your eyes and forms sulfuric acid, a fiery irritant.
An oyster forms pearls by secreting a mineral substance called nacre and uses it to quarantine an irritant.
Sporting the same DNA, and thus matching physical features, identical twins can get away with duping friends and family.
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