French tent type camera obscura, 1826-1850.

Folding tent-type camera obscura, 1800-1824.

Folding tent-type camera obscura, 1800-1824.

Evidence for Recent Liquid Water on Mars

Inuit fire-stick from the Arctic.

Locomotive at Horwich works, c 1905

'A Seer Attempting to Destroy an Indian Girl by a Pencil of Sunlight', 1855.

Dalton's wooden atomic models, early 19th century.

Machine shop at Bow works, London, 1898.

York Station, 1988.

'How Small Can We Go?', 1993. Mural by Davi

'How Small Can We Go?', 1993. Mural by Davi