On a chilly September day in Cavendish, Vermont, 25-year-old Phineas Gage experienced something he would never forget. As he packed explosives with a tamping rod, they went off, launching the rod straight through his head. Miraculously, Phineas recovered from what many thought be a death sentence.

In a world full of technology, it's common to end the day watching TV, scrolling on social media, or playing video games. It seems like a good way to unwind, but you might find it hard to fall asleep after a looking at a bright screen. This is no coincidence; using screens before bed can interfere with your sleep.