Sneaky Trick Uses Math Magic to Guess Your Cards

Math is basically magic. So it’s no surprise that a clever use of the Fibonacci numbers—a series of numbers (1, 2, 3, 5, 8, etc.) where each number is the sum of the two preceding numbers—and a super-slick shuffling method can combine for a card trick that makes it impossibly easy to guess the number and suit of the two cards you’re holding.

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The FBI Is Developing Software to Track and Sort People by Their Tattoos

An Electronic Frontier Foundation (EFF) investigation just revealed an awfully Orwellian fact: the FBI is working with government researchers to develop advanced tattoo recognition technology. This would allow law enforcement to sort and identify people based on their tattoos to determine “affiliation to gangs, sub-cultures, religious or ritualistic beliefs, or political ideology.”

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You Should Go Check Facebook’s New Privacy Settings

LAST WEEK, FACEBOOK introduced a way to show ads across the web to everyone, not just its own users. At the same time, it added a new privacy setting for people already on Facebook to limit how their activity on the social network shows up in ads elsewhere. It gets confusing! Here’s what’s up.

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