The average person's thumb travels 52 miles a year scrolling through social media sites.
This is based on estimates that we spend 49 minutes per day scrolling through FB, IG and Twitter.
There's even an interactive online simulator for mobile called Thumb Run, in the style of a retro 1980s arcade game, to help get a grip on this insane total. If you're seeing this on a mobile device, you can try it out HERE.