Trivia: What was the subject of the first photo posted on Instagram?
A taco
A rainbow
A shirt
A dog
The correct answer is A dog
So why is this answer correct? : Predating the thousands of popular animal accounts that the app hosts today, Instagram’s very first post featured a stray dog. Posted by Kevin Systrom, co-founder of the photo-sharing network, the picture appeared on the app in October 2010 with the simple caption, “test.” Today, the post has more than 300,000 likes, which is but a small fraction of the app’s total of more than 1 billion users.