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    Literate recruits took the written Alpha test, while illiterate applicants took a visual Beta.

    During World War I, the U.S. Army needed a system that would quickly sort recruits into their ideal roles.

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    photo of a researcher talking into the ear of a Pepper robot

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    The society is open only to people who score in the 98th percentile or higher on a preapproved intelligence test.

    The society is open only to people who score in the 98th percentile or higher on a preapproved intelligence test. To be a Mensa member, hopefuls must demonstrate…

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    Algae bloom in Lake Erie, September 2017

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    Psychologists are still arguing about the best methods to spot intelligence.

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    But the cold would kill you before the smell did.

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    last week in tech

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    Be sure to download the latest edition of the Last Week in Tech podcast!

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    memory experts

    Scientists share their favorite stories.

    When one crow sees another dead on the ground, it caws an alarm. Then others—five to six on average, but in rare cases as many as 60—fly in and perch on branches,…

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    Younger galaxies appear flatter than their more well-rounded elders

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