Staring at a phone screen before bed can cause depression

Staring at your phone screen when you should be sleeping can make you depressed over time, new research suggests. Chinese experiments suggest harmful blue light emissions from your device at night trigger a mysterious neural mechanism, leading to behavioural changes. The research team found that mice exposed to blue light for two hours a night over a few weeks started showing depressive-like behaviour. But by blocking brain signals that are triggered by blue light at night, the mice no longer showed behavioural changes. The neural pathway responsible for this phenomenon may provide insight into how exposure to excessive light at night time affects humans.