What is the distance between the birth and death of a human being? The question has dogged us for many centuries: what is at stake? Can we measure that distance in years or feelings or memories?

The Skull and Crossbones resides in a constellation in the southern skies called Puppis, which is the poop deck of a ship. It was originally part of a larger constellation covering the entire ship ...

The skull sectioned is a drawing by Leonardo da Vinci (1452-1519) and, dating from 1489, one of his earliest human anatomical studies. That year, for the first time, he had acquired a human skull.