Mari, a 26-year-old book critic, inspired Twitter users to get started reminiscing about the 2010s when she posted a picture of herself at the beginning of the decade vs. now.

Mari, a 26-year-old book critic, inspired Twitter users to get started reminiscing about the 2010s when she posted a picture of herself at the beginning of the decade vs. now.

Unless you have been on a social media cleanse you have seen a #10YearChallenge 2009 vs. 2019 post. The idea is simple, post side-by-side comparison photos of yourself from both years just to prove how strong your glow-up was.

Unless you have been on a social media cleanse you have seen a #10YearChallenge 2009 vs. 2019 post. The idea is simple, post side-by-side comparison photos of yourself from both years...