The probability of someone cheating during the course of a relationship varies between 40 and 76 percent. "It's very high," says Geneviève Beaulieu-Pelletier, PhD student at the Université de Montréal's Department of Psychology.

The probability of someone cheating during the course of a relationship varies between 40 and 76 percent. "It's very high," says Geneviève Beaulieu-Pelletier, PhD student at the Université de Montréal's Department of Psychology.

Far from being a model of social co-operation, the ant world is riddled with cheating and corruption – and it goes all the way to the top, according to scientists from the Universities of Leeds and Copenhagen .

Far from being a model of social co-operation, the ant world is riddled with cheating and corruption – and it goes all the way to the top, according to scientists from the Universities of Leeds and Copenhagen.

Women see ‘masculine’ men as unsuitable long-term partners, new research suggests. Conversely, the psychologists from Durham and St Andrews Universities found that men with feminine facial features are seen as more committed and less likely to cheat on their partners.

Freeloaders can live on the fruits of the cooperation of others, but their selfishness can have long-term consequences, reports an evolutionary biologist from The University of Texas at Austin in a new study.

While humans stray from their mates for any number of reasons, superb starling females appear to stray for the sake of their chicks, according to recent Cornell research published in the Proceedings of the Royal Society of London B.