Helping Others Makes You Happier

A study has shown that those spending money on others - even strangers - reported feeling happier than those spending it on themselves.

Most animals help those closely related - a process named kinship selection - but humans seem to be different, extending our generosity farther.

The difference between animals and humans comes down to how we can pass down information. Whereas animals can only do it via genes, we can do it externally, too, through culture.