An isotopic analysis of eggshell beads dating back more than 30,000 years indicates that they helped build networks that stretched for hundreds of kilometers.
People tend to sniff their mitts after shaking hands with someone of the same sex, suggesting that the traditional greeting may transmit chemosensory signals.
Researchers have captured footage of wild chimpanzees teaching each other to use tools, lending support to the idea that humans aren’t the only primates to engage in social learning.
NIH Director Francis Collins and colleagues announce plans to create a health-care research network to connect patients, doctors, and clinical researchers.