If you've had an annual checkup recently, your doctor probably ran a blood test to look at things such as your cholesterol levels. Researchers are also interested in the levels of cholesterol and ...

The more we try to understand chimpanzees, one of our closest relatives, the more we find ourselves humbled by the richness and complexity of their lives — and of their intelligence. Today, on World ...

A recent study assessed wild chimpanzees’ use of sticks as a tool, monitoring how chimps of different ages gripped and manipulated the implement to retrieve food from tricky places. The study found ...