A Contagious Aversion to Overhead Lights

A study finds that many people automatically avoid overhead lights, even when they're not bright enough to cause discomfort.

The research suggests that this 'contagious' aversion could be due to evolutionary reasons, as bright lights can signal danger.

In other news, a survey finds that most people would go out of their way to help a colleague in need, and a new feature allows users to give advice to others.