As viewers of the Showtime series “Dexter” are well aware, everyone’s favorite serial killer has a ritual whereby he saves a drop of blood from each of his victims on a microscope slide. Now fans can ...

One of Charles Darwin’s microscope slides from his groundbreaking geological research is set for auction after being discovered in a cardboard box - almost 200 years on. The tiny piece of history, ...

Red dye fills the tiny blood vessels of this tongue tissue. The large, roundish structure in the center of image is a projection on the surface of the tongue known as a fungiform papilla. These ...

A miniature photograph of the moon, beard hairs whose owner has been dead for centuries, a shaving of Egyptian mummy bone, flowerlike patterns constructed from butterfly scales and algae called ...