On the edge of the Mongolian steppe, overlooking where two rivers meet, lies an ancient cemetery. Buried within are two families, traced through ancient DNA across six generations, surrounded by dozens of "strangers." The obvious assumption is that this was a family cemetery. But a recent study used machine learning and a technique borrowed from evolutionary biology to reveal that what really mattered was wealth, status and political power, not blood.

A one-off training session increased how much time fathers spent with their children and on chores by about two hours a week, reports a new study from the University of Tokyo. A team in Japan provided male employees and their managers with either information on positive office attitudes toward paternity leave or a work-life balance training session. The former corrected common misconceptions, but fathers who attended the training reported real behavioral change. This unexpectedly freed up 3.6 hours of time that mothers used for their own work. The study shows how small workplace interventions can have wider positive impacts for families and businesses.

Researchers reported this week a deadly outbreak of plague in Siberia 5,500 years ago, revealing that Yersinia pestis evolved lethal genetic traits far earlier than suspected. A drug developed for heart tissue repair may also help kidney tissue repair and regeneration. And neighborhood socialization opportunities could shape children's brain development.