Glimpses of fatherhood found in non-pair-bonding chimps

Although they have no way of identifying their biological fathers, male chimpanzees form intimate bonds with them, a finding that questions the idea of fatherhood in some of humanity's closest relatives, according to a study ...

Female mice prefer unfamiliar male songs

Female mice prefer songs of mice that are different from their parents when selecting a mate, according to a study published February 5, 2014 in PLOS ONE by Akari Asaba from the Azabu University, Japan, and colleagues. Furthermore, ...

Research shows negative effects of half-siblings

Adolescents who have half-siblings with a different father are more likely to have used drugs and had sex by age 15 than those who have only full siblings. That's according to new research from Karen Benjamin Guzzo, an assistant ...

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 ...

Sexy sons thanks to mom

It is not the superior genes of the father, but the mother's resource investment in the eggs that makes Zebra Finch males particularly attractive. A Swiss-Australian research team lead by evolutionary ecologists at the University ...