Featured in Spring 2018
Solve the Monty Hall Problem with simple math—if its psychology doesn’t trip you up
What’s behind door number one?
Build a yoga room to save you from your smartphone
Everything you need to stretch and take an hour off from the notification onslaught.
How much space does all of humanity’s knowledge take up?
It takes a lot of data storage to know it all.
In photos: a rare glimpse inside the heart of a quantum computer
Inside the lab where computing makes a quantum leap.
Proving precognition, programming a screenwriter, and other tales from the field
Scientists share their favorite stories.
Do you make the cut? Four of history’s trickiest entrance exams.
Psychologists are still arguing about the best methods to spot intelligence.
Want to take a Mensa intelligence test? Here are four practice questions
The society is open only to people who score in the 98th percentile or higher on a preapproved intelligence test.
Can you pass IBM’s test for entry-level roles?
The Information Processing Aptitude test is notoriously difficult.
Can you pass the U.S. Army’s World War I-era intelligence test?
Literate recruits took the written Alpha test, while illiterate applicants took a visual Beta.
Can you pass the test NASA gave potential astronauts in 1958?
May John Glenn be with you.