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COVID-19 Is Raging. How Safe Is Your Backyard Party?

August 6, 2020

Awash in coronavirus data, misinformation and tremendous uncertainty, we need to put our risk analysis skills to the ultimate test.

insights puzzle

How to Design (or at Least Model) Mixed Dog Breeds

July 31, 2020

Readers simulated the genetics of dog breeding to solve a puzzle about mixed breed percentages and sexual reproduction.

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How to Breed a Pomsky and Other Questions About Dogs and Sex

June 18, 2020

Solve a puzzle about mixed dog breeds, sexual reproduction and the COVID-19 pandemic.

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Why Our Perpetual Energy Puzzle Fails

May 22, 2020

Readers poked holes in our paradoxical April Fools’ Day claims about perpetual energy and whether this puzzle solution would ever be published.

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How to Design a Perpetual Energy Machine

April 1, 2020

This April, find the fatal flaws in two paradoxical claims — one about a perpetual source of energy and the other about whether you will ever see the solution to these puzzles.

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Solution: ‘Is It Turtles All the Way Down?’

March 27, 2020

While the age-old chicken-and-egg paradox is easily answered, the question of infinite regress in physics is far from resolved.

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Did the Chicken Come First or Is It Turtles All the Way Down?

February 6, 2020

The apparent paradox of the chicken and the egg smells like “turtles all the way down.” This puzzle shows how biology and physics can overcome infinite regress.

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Solution: ‘Natural Law and Elegant Math’

January 17, 2020

While mathematics gives us elegant explanations for many physical phenomena, real-world situations often require us to scramble through dense numerical thickets.

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Does Natural Law Need Elegant Mathematics?

December 5, 2019

Many of us are drawn to beauty in mathematics. But is that the way nature really works?