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Illustration for Demystified "How Dangerous is Quicksand"

How Deadly Is Quicksand?

All Saints Day. All Souls Day. Candles in cemetery in Poland on All Saints Day, November 1. All Souls Day, November 2. Christian church, All Hallows, Solemnity of All Saints, Feast of All Saints, purgatory, Roman Catholic church

7 Unique Burial Rituals Across the World

The Colosseum, Rome, Italy. Giant amphitheatre built in Rome under the Flavian emperors. (ancient architecture; architectural ruins)

New Seven Wonders of the World

Queen Elizabeth II addresses at opening of Parliament. (Date unknown on photo, but may be 1958, the first time the opening of Parliament was filmed.)

All 119 References in “We Didn’t Start the Fire,” Explained

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?

African Americans demonstrating for voting rights in front of the White House as police and others watch, March 12, 1965. One sign reads, "We demand the right to vote everywhere." Voting Rights Act, civil rights.

Timeline of the American Civil Rights Movement

Chinese pictograph, calligraphy tablet of Huang Tingjian, a famous calligrapher in Ancient Song Dynasty. The background of Chinese cultural elements.

The World’s 5 Most Commonly Used Writing Systems

spur

physics

Learn about this topic in these articles:

role in radiation chemistry

In radiation: Radiation chemistry
…energy in small collections called spurs, which may be 1,000 angstroms (10^-5 centimetre) or so apart. The appearance of the excitation and ionization track has been likened to a rope (in the case of positive-ion bombardment), on the one hand, as compared with isolated beads on a string (in the…
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