The science of selfies.

• Position: TECHNOLOGY - Brief article

From Rihanna to the Pope, everyone's taking a selfies. But what do the digital self-portraits say about us? An international team of computer scientists analyzed 3,200 selfies on Instagram from New York, Berlin, Bangkok, Moscow, and Sao Paulo, Brazil. Among their findings: Selfie-takers are young (24 on average), and most are women, who tend to strike more dramatic poses than men. Bangkok's selfie-takers smile the most, Moscow's are the most glum, and New York's...