Some technologies can be used to manipulate mood. Drug research offers insights into their possible impact.
Even though sadness and bad moods have always been part of the human experience, we live in an age that ignores or devalues them. But we've much to gain from feeling sad now and again.
A world-first trial showed depression is reduced after just three months following a diet rich in vegetables, fruits, wholegrains, legumes, fish, lean red meats, olive oil and nuts.