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As the population of people diagnosed with autism spectrum disorder keeps growing, so does the number of people with that diagnosis who aren't finding employment. Though many young adults on the spectrum are considered high functioning, recent research shows 40 percent don't find work — a higher jobless rate than people with other developmental disabilities experience. Research scientist Anne Roux, of the A.J. Drexel Autism Institute in Philadelphia, studies young adults with autism and was the lead author of that study. (Noguchi, 5/18)

More than a quarter of gay and bisexual men in some cities and states in the South are living with H.I.V., according to a new study — a far higher rate than in the country as a whole. The study shows how much more common H.I.V., the virus that causes AIDS, is among gay black men, especially in the South, as well as how little is being done to prevent its spread in a group whose members face discrimination and are less likely to have medical insurance. (McNeil, 5/18)

A single question asked at an annual checkup — whether parents have trouble making ends meet — could help pediatricians identify children at risk for serious health problems associated with poverty and the chronic levels of stress that often accompany it. The American Academy of Pediatrics urges members to ask if their patients' families are struggling financially and then commit to helping them get the resources they need to thrive. And some communities are trying to make that happen. Since almost half of young children in the United States live in poverty or near poverty, it's no small challenge. (Korry, 5/18)

A handful of scientists around the United States are trying to do something that some people find disturbing: make embryos that are part human, part animal. The researchers hope these embryos, known as chimeras, could eventually help save the lives of people with a wide range of diseases. One way would be to use chimera embryos to create better animal models to study how human diseases happen and how they progress. (Stein, 5/18)

Single mothers, untenured professors, young reporters and on-call doctors might have a thin silver lining for their hurried days and response for the people who insist on slowing down: All that hustling may translate into superior brain power as you get older, as a study finds that the busiest people perform best on cognitive tests. Sara Festini, a postdoctoral researcher at the University of Texas, Dallas, and her adviser, Denise Park, published the study in Frontiers in Aging Neuroscience on Tuesday. They tested over 300 people between the ages of 50 and 89 on cognitive functions including memory, reasoning and mental quickness. (Chen, 5/18)