TIL there is a rare condition called fibrodysplasia ossificans progressiva, where soft tissues in the body gradually turn into bone.

https://en.wikipedia.org/wiki/Fibrodysplasia_ossificans_progressiva
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1gvkcog/til_there_is_a_rare_condition_called/