Featured in Spring 2018

Solve the Monty Hall Problem with simple math—if its psychology doesn’t trip you up
Build a yoga room to save you from your smartphone
How much space does all of humanity’s knowledge take up?
In photos: a rare glimpse inside the heart of a quantum computer
Proving precognition, programming a screenwriter, and other tales from the field
Do you make the cut? Four of history’s trickiest entrance exams.
Want to take a Mensa intelligence test? Here are four practice questions
Can you pass IBM’s test for entry-level roles?
Can you pass the U.S. Army’s World War I-era intelligence test?
Can you pass the test NASA gave potential astronauts in 1958?