Scientists manipulated mice to make them lose track of time

The mystery of why “time flies when we’re having fun” is a little closer to being solved thanks to scientists who manipulated mice brains using light.In a study published today in the journal Science, researchers at Portugal’s Champalimaud Centre for the Unknown stimulated certain brain cells (or neurons) in mice to make them produce more of a much-hyped chemical called dopamine. Dopamine can play a role in everything from attention to reward, and previous work suggests t