Scientists mapping the human body at the cellular level keep running into the same surprise: beneath the apparent chaos of ...

The human body is made up of a complex community of trillions of cells of diverse shapes and sizes, all working together to keep you alive. The smallest of these cells, like platelets and red blood ...

Two types of white blood cells, a neutrophil (top) and a lymphocyte (bottom), in human blood. Ed Reschke via Getty Images In an effort that began more than ten years ago, scientists have estimated ...