Why looking at your phone is terrible for your sleep but watching TV isn't

Alyssa L. Miller/Flickr I do a lot of things that are bad for my sleep. Case in point: Every night I spend at least half an hour scrolling mindlessly through my Instagram and Facebook feeds, bombarding my eyes with blue light that sends a signal to my brain to stay wide awake. But it's always been a consolation to me that at least I don't — heaven forbid! — watch television before going to sleep. Everyone knows that's the worst bedtime habit you can possibly have. Except, well, that's probab...