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Articles on Coins

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A mathematical approach known as ‘true score theory’ can assess the contribution of luck to a team’s overall success. Bruce Bennett/Getty Images

Why luck plays such a big role in hockey

With low-scoring games and a preponderance of deflected shots, randomness is much more likely to color NHL teams’ records than those of squads in the other four major US pro sports leagues.
Cash is pretty convenient. Dilok Klaisataporn/EyeEm via Getty Images

Why does money exist?

Paying for the stuff you want with currency is way easier than relying on chairs you made or chickens you raised.
Soldiers used spent shells and casings to make trench art, like this brass bottle opener that was made during World War II. Michael Riordan

America’s hidden world of handmade pornography

One scholar spent a decade studying the ways everyday people drew, carved, glued, sewed and baked their own pornography.
Have you ever wondered why U.S. money is green? Yulia Grigoryeva/Shutterstock.com

Why are dollar bills green?

The color of American money goes back to the British colonies.

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