primary rainbow

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

Poker Hands Ranked

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

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?

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7 of History's Most Notorious Serial Killers

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?

King Cobra snake in Malaysia. (reptile)

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Water Fluoridation: Just the Facts

primary rainbow

atmospheric phenomenon

Learn about this topic in these articles:

characteristic of rainbows

In rainbow
…common rainbow is the so-called primary bow, which results from light that emerges from the drop after one internal reflection.
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