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Skeleton fossil record of ancient reptiles in stone.

Do Fossil Fuels Really Come from Fossils?

$Reflections in a diamond. (gem; cut gemstone; optics; refraction)$

Cold Stones: 9 Gems That Will Make You Feel Like a Peasant

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Poker game. Card game. Royal Flush in poker. Hearts suit gambling

Poker Hands Ranked

Gutzon Borglum. Presidents. Sculpture. National park. George Washington. Thomas Jefferson. Theodore Roosevelt. Abraham Lincoln. Mount Rushmore National Memorial, South Dakota.

9 Memorials and Monuments in the United States

Cathedrale St.Jean in Lyon, France has a 14th-century astronomical clock that shows religious feast days till the year 2019; Perpetual Calendar

Ten Days That Vanished: The Switch to the Gregorian Calendar

King Cobra snake in Malaysia. (reptile)

9 of the World’s Deadliest Snakes

Drinking water is poured into a glass.

Water Fluoridation: Just the Facts

Periodical Cicada, Adult, Magicicada spp. Requires 17 years to complete development. Nymph splits its skin, and transforms into an adult. Feeds on sap of tree roots. Northern Illinois Brood. This brood is the largest emergence of cicadas anywhere

Why Do Some Cicadas Appear Only Every 17 Years?

Shadow of a man holding large knife in his hand inside of some dark, spooky buiding

7 of History's Most Notorious Serial Killers

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