Paul D Stewart / 1881 portrait of Charles Robert Darwin (12 February 1809 - 19 April 1882) English Naturalist and author of the Origin of Species. 1922 Hand coloured portrait aquatint of Darwin by G. Sidney Hunt after...

Paul D Stewart / Aerial view of Grand Prismatic thermal spring in Yellowstone National Park, USA. The bright colours are natural, coming from thermophile bacteria in the water. People can be seen walking on the raised...

Paul D Stewart / Long exposure (30 second) exposure of Clepsydra Geyser taken at night by moon light with stars visible in sky. This geyser is located in the Lower Geyser Basin of Yellowstone National Park in USA. The...

Miles Barton / Pygmy blue tongued skink (Tiliqua adelaidensis) feeding on mealworm on fishing line, a technique used by scientists and conservationists to catch them, and being filmed with straightscope lens. Burra,...

Miles Barton / Pygmy blue tongued skink (Tiliqua adelaidensis) feeding on mealworm on fishing line, a technique uded by scientists and conservationists to catch them. Burra, South Australia

Adam White / Puffin decoys, and scientists searching for puffin burrows Seal Island Maine USA

Paul D Stewart / 1881 portrait of Charles Robert Darwin ( 12 February 1809 - 19 April 1882), English Naturalist and author of the Origin of Species. 1922 Hand coloured portrait aquatint of Darwin by G. Sidney Hunt aft...

Paul D Stewart / 1909 illustration of Charles Darwin in tree with young chimpanzee (left) and orangutan (right) by the German artist Thomas Theodor Heine in the periodical 'Simplicissimus' 15th February 1909. This for...

Paul D Stewart / 1909 'On Darwin's hundredth Birthday' Illustration of Charles Darwin in heavenly tree with young chimpanzee (left) and orangutan (right). Chromolithograph by the German artist Thomas Theodor Heine in...

Paul D Stewart / Portrait of Richard Owen (20, July 1804 - 18 December 1892), 1894 engraving from an 1840s painting by Pickersgill, later hand colouring. Owen was a comparative anatomist and palaeontologist. He coined...

Paul D Stewart / Portrait of Charles Waterton (1782-1865), steel plate engraved frontis with later tinting from 'Essays on Natural History by Charles Waterton, edited with a life of the author by Norman Moore, B.A.' P...

Paul D Stewart / Portrait of Friedrich Alexander von Humboldt (14th September 1769 - 6th May 1859), Lizars' Steel engraving c 1830 with hand colouring after the 1806 painting by Friedrich Weitsch. A German explorer an...

Paul D Stewart / Portrait of Erasmus Darwin (1731-1802) from a picture by Wright of Derby, reproduced with later hand colouring by his grandson, Charles Darwin in 'Life of Erasmus Darwin' 1879 (Ernst Krause co-author)...

Paul D Stewart / 1849 portrait of John Stevens Henslow (6 February 1796-16 May 1861), crop of lithographic portrait from life by Thomas Herbert Maguire as part of the Friends of the Ipswich Museum scientific portrait...