Men appear to get greater satisfaction than women when witnessing retribution, research suggests.
Scientists monitored brain activity in people while they watched someone they either liked or disliked apparently suffering pain.
While women showed signs of empathy with people they both liked and disliked, men appeared to enjoy pain being inflicted on their foes.
The study, by University College London, is published in Nature.
BBC NEWS | Health | Revenge ‘more satisfying for men’