GOOD BET? Income gains from a new or expanded casino might go hand in hand with improved body weight in Native American children, a study finds.
SUICIDE IN THE CITY Big Brazilian cities (São Paulo, shown) tend to have lower suicide rates than smaller cities. A larger pool of social connections in bigger cities could help sustain city dwellers’ mental health.
ONE OR TWO These ancient lower jaws excavated in West Asia come from two different Homo species, a contested study concludes. The assessment conflicts with the proposal by the fossils’ discoverers that they represent a single species.