Paul D Stewart / Illustration of Monitor lizard (Lacerta monitor) now known as the Nile monitor (Varanus niloticus) from J. Frid Gmelin and Carl Linnaeus (posthumous). 'A Genuine and Universal System of Natural Histo...

Paul D Stewart / Portrait of Jean Baptiste Lamarck (1 August 1744 - 18 December 1829) Lamarck was a french pre-Darwinian advocate of evolution (transmutation) and an influential invertebrate taxonomist.

Paul D Stewart / Woodcut illustration of dolphin's placenta, skull and birth by Gesner. Gesner 'Icones Animalium', 1560. Generally animals were grouped by habitat, so dolphins were thought of as fish. However Gesner d...

Paul D Stewart / Woodcut by Gesner 'Icones Animalium', 1560. Gesner and his contemporaries believed marine mammals were fish based on habitat. However Gesner did note that unlike fish they have no scales, give birth a...

Klaus Echle / Collected seeds in glass jars from pine and other trees stored in a cellar. Black Forest, Germany, July.

Klaus Echle / Collected seeds in glass jars from pine and other trees. Black Forest, Germany, July.

Paul D Stewart / Illustrated portraits of Richard Owen (20, July 1804- 18 December 1892) and Thomas Henry Huxley (4 May 1825 - 29 June 1895). Linley Sambourne's illustration for the new 1885 Macmillan edition of Kings...

Paul D Stewart / Portrait of Richard Owen (20, July 1804- 18 December 1892); 1883 portrait in his home study for The Graphic magazine, in the year he retired from the BMNH. Owen was a comparative anatomist and palaeon...

Paul D Stewart / Portrait of Richard Owen (20, July 1804- 18 December 1892), 1889 mezzotint by H.J. Thaddeus with contemporary face but pose taken from an earlier 1852 photograph with dinosaur. Owen was a comparative...

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 John Gould (14 September 1804 - 3 February 1881). Engraving by T.H. Maguire 1849 as part of the friends of the Ipswich Museum series. Gould was a wildlife illustrator and ornithologist bor...

Paul D Stewart / A Galapagos Mockingbird, from the collection of the Charles Darwin Research Station on Galapagos. While actually on the Beagle voyage, it was the mockinbirds, and not the celebrated finches gave Darwi...