A stack of toilet paper sits on the back of a toilet - Witthaya Prasongsin/Getty Images From roommates to your own family members, if you've ever shared a bathroom, you've likely found yourself caught ...

hoarder. In fact, I once got my car broken into because I was using my trunk to store three packs of Costco-size TP (which I had gotten from my mother, herself a toilet-paper hoarder who had bought ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...