Hard Work Could be Bad for Your Health

A new study of a cooperative bird in the Kalahari Desert suggests that unequal sharing of workloads in societies could leave the most industrious individuals at higher risk of poor health and prone to accelerated ageing. A team of scientists at the University of Exeter studied white-browed sparrow weavers, a social species in which all group members share offspring care duties, but the dominant male and female work hardest. Dominants are the only birds ...