I was just explaining to my teenage son what quarks are -- he hadn't learned about them yet. So I have to upvote this. tl;dr If you decompose matter all the wa

I was just explaining to my teenage son what quarks are -- he hadn't learned about them yet. So I have to upvote this. tl;dr If you decompose matter all the way down, mass doesn't just "add up the parts to the whole". Not by several orders of magnitude!