Psychology & Psychiatry

Study proposes new theory for evolution of infant-directed song

These days, it's a territory mostly dominated by the likes of Raffi and the Wiggles, but there's new evidence that lullabies, play songs, and other music for babies and toddlers may have some deep evolutionary roots.

HIV & AIDS

Antibody combination puts HIV on the ropes

Without antiretroviral drug treatment, the majority of people infected with HIV ultimately develop AIDS, as the virus changes and evolves beyond the body's ability to control it. But a small group of infected individuals—called ...