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Candles Burning On Table In Church

What Is the Most Widely Practiced Religion in the World?

African American man praying in church with stained glass in background

Why Do People Say “Amen” at the End of a Prayer?

Ahura Mazda - relief of the Zoroastrian god Ahura Mazda at the ancient ruins of Persepolis in Iran. Also known as Ormazd Zoroastrianism,

Which Religion Is the Oldest?

Discover

Malayan Leaf Frog - Megophrys nasuta

9 Animals That Look Like Leaves

Andrew Jackson delivering a speech while on his way to Washington, D.C., for his inauguration in 1829. From Harper's Weekly, 1881.

5 Remarkably Close U.S. Presidential Elections

Martin Luther King, Jr.

Why We Celebrate MLK Day

Red Army (Soviet) soldiers in the Russian Revolution.

Russian Revolution Timeline

The impeachment trial of Pres. Andrew Johnson, illustration from Frank Leslie's Illustrated Newspaper, March 28, 1868.

What If the President Is Impeached?

Nazi Germany, Nazi SS troops marching with victory standards at the Party Day rally in Nuremberg, Germany, 1933. (Schutzstaffel, Nazi Party, Nurnberg)

Why Was Nazi Germany Called the Third Reich?

Close-up of ostriches (Struthio camelus) necks and heads; location unknown.

6 of the World's Most Dangerous Birds

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More Articles On This Topic

Assorted References

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- In Scientology: Hubbard’s early life and beliefs
- In new religious movement: Scientific NRMs: UFO groups and Scientology
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Article Contributors

Primary Contributors

The Editors of Encyclopaedia Britannica

Other Encyclopedia Britannica Contributors

Article History

Type	Description	Contributor	Date
	Invalidated site: "Dianetics" on ''The Skeptic's Dictionary''.	Thinley Kalsang Bhutia	Jun 01, 2015
	New article added.	Matt Stefon	Nov 25, 2009