Sisters improve chances of reproduction in Asian elephants

Researchers at the University of Turku found that the presence of a maternal sister was positively and significantly associated with annual female reproduction in a population of working elephants in Myanmar. In addition, ...

Remarkable letter reveals earthquake drama for nuns in exile

Traveling around Europe in search of a new home after the dissolution of the monasteries must have been dramatic enough for England's oldest community of Bridgettine nuns. But a remarkable newly-catalogued letter shows they ...

When leaving your wealth to your sister's children makes sense

In most human societies, men pass on their worldly goods to their wife's children. But in about ten percent of societies, men transfer their wealth to their sister's sons, a process called matrilineal inheritance. A new study ...

Helping family is key for social birds

(Phys.org) -- Social birds that forgo breeding to help to raise the offspring of other group members are far more likely care for their own close relatives than for more distant kin, a new study has found.

Having brothers delays sexual maturation in women

(PhysOrg.com) -- Scientists in Perth, Western Australia, investigating the costs of brothers and sisters in contemporary Australian society, have discovered that girls with older brothers tend to start menstruation later, ...