Imagine living with the same group of people for your entire life ... They groom them, rest near them, and aid them in social conflicts much more often than they do non-relatives. Maternal sisters are ...

Why be social? And, why not be? What are the costs and benefits of sociality, and what types of sociality characterize nonhuman primates? Given all of these potential costs of group living, why do ...

The Social Security Administration overpays billions in benefits annually. The agency will increase its efforts to be repaid starting March 27.