Émilie Du Châtelet was one of the great figures of the Enlightenment in France.

The lens, a tool technology that helps make the invisible world visible, brought a revolutionary perspective to our descriptions of nature.

Charles Darwin was able to pursue his life's work despite suffering from a variety of ailments the doctors could never explain. 

Darwinius is an exceptionally well preserved, 47-million-year-old primate from the ancient Messel Pit in Germany. Its position in evolution is contested.