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Basalt sample returned by Apollo 15, from near a long sinous lunar valley called Hadley Rille. Measured at 3.3 years old.
(Bed) Rocks and (Flint) Stones
Discover
Drinking water is poured into a glass.
Water Fluoridation: Just the Facts
Amendments 1-10 to the Constitution of the United States constitute what is known as the Bill of Rights on an American flag.
What Is the Emoluments Clause?
Illustration for Demystified "How Dangerous is Quicksand"
How Deadly Is Quicksand?
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
Portrait of a mountain gorilla at a short distance. gorilla close up portrait.The mountain gorilla (Gorilla beringei beringei)
Falling Stars: 10 of the Most Famous Endangered Species
US Marines firing at Fallujah, Iraq, during the Second Battle of Fallujah in November 2004. Operation Iraqi Freedom, Iraq War.
Timeline of the 2000s
Dancers at a Cinco de Mayo festival at the Mission District, San Francisco, California. (Photo dated 2019.) holidays
Is Cinco de Mayo Mexico's Independence Day?

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Basalt sample returned by Apollo 15, from near a long sinous lunar valley called Hadley Rille. Measured at 3.3 years old.
(Bed) Rocks and (Flint) Stones