For more than a century, medical students have memorized the same map of the human body, confident that every major structure had already been charted. Yet recent research suggests that even in the ...

A raft of research is recasting the thymus from a bit player to a potent regulator of aging and immune health.

For generations, medical students were taught that the map of the human body was essentially complete. Yet cancer imaging has now exposed a hidden structure in the head and neck that behaves like a ...

An analysis of biological clocks throughout the human body suggests that too few hours of sleep-and too many-may speed aging ...