For most of the story, the humans got up with the sun and fell asleep when it set. But today, with the push of a button, the night becomes a day, which allows us to work, play and post photos of cats and children on Facebook until the wee hours. However, according to a new study led by biologist Sams Hattar of Johns Hopkins, when people habitually burn midnight oil, they risk depression and learning problems. Guilty? Exposure to bright light in the night of lamps, computers and even iPads.
Video credits to Johns Hopkins University YouTube channel