'The Science of Selfies' by Cathy Newman in National Geographic

"When the magisterial Oxford English Dictionary crowned "selfie" the word of the year in 2013, it only affirmed what anyone with a smartphone has known since the first photo with the hashtag selfie was posted on January 16, 2011: Self-documentation has gone viral. According to Unmetric, a company that analyzes social media for global brands, 73 million selfies have been posted on Instagram since then."

Read the full article here.