Images

Various types of corn (maize). Photo by Keith Weller. Agricultural Research Service, U.S. Department of Agriculture.

Lahore Fort, Pakistan, called Shahi Qila (meaning "Royal Fort") in Urdu, was originally built in the 11th century, then destroyed and rebuilt several times. The site was inscribed as a UNESCO World Heritage Site in 1981.

A board showing the tools commonly used by stone masons in the Middle Ages in Europe. On display at Guédelon castle in Treigny, Burgundy, France.

A board showing the carpentry tools commonly used in the Middle Ages in Europe. On display at Guédelon castle in Treigny, Burgundy, France.

The tomb of the mathematician and physicist Isaac Newton (1642-1727) in Westminster Abbey, London.

A gilded commemorative medal showing the mathematician and physicist Isaac Newton (1642-1727). Made in England in 1726. (Science Museum, London)

The personal copy of Isaac Newton's (1642-1727) own work Principia in which he outlines his three laws of motion and universal law of gravity. (Wren Library, Trinity College, Cambridge)

A 1689 oil on canvas portrait by Godfrey Kneller of Isaac Newton (1642-1727).

Two prisms illustrating the discovery by Isaac Newton (1642-1727) that a single beam of white light could be split into a spectrum of colours, each colour being refracted at a slightly different angle from the other.

Salutation to the Great Spirit, oil painting by Frithjof Schuon, 1963.