Instagram was created in just eight weeks by Kevin Systrom and Mike Krieger in 2010.

The first photo ever uploaded to Instagram was of a dog, shared by co-founder Kevin Systrom

Instagram hit 1 million users within just two months of its launch, faster than any other app

The most-liked post on Instagram is a photo of an egg, with over 55 million likes

Instagram was bought by Facebook in 2012 for $1 billion when it had only 13 employees.

Instagram's algorithm favors saves and shares more than likes or comments for post reach.

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