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Instagram, the popular photo sharing application, is celebrating its fifth anniversary. Reuters reports that Instagram has 400 million-plus users worldwide, but it had to start somewhere.
Today's Stumper is:
What was the subject of the first photograph posted on Instagram?
The answer is dog.
Time.com says the first photograph posted to Instagram was posted to the app before it officially became Instagram. It was called "codename" at the time, and Instagram CEO and co-founder Kevin Systrom uploaded a picture of a golden retriever at a taco stand. There are a lot of pet pictures on the app now, but cbsnews.com says the three most popular accounts on Instagram are for Taylor Swift, Kim Kardashian and Beyonce, in that order.