UIG865079: Portrait of James Syme, 1917 (egraving) / Bridgeman Images

UIG865083: English explorers J.H. Speke and J.A. Grant / Bridgeman Images

UIG865086: William GGV Vernon Harcourt / Bridgeman Images

UIG865091: Electrostatic machine used by J.Priestley / Bridgeman Images

UIG865100: Burning of Royal Navy training ship 'Goliath', 1876, Tenniel, John (1820-1914) / Bridgeman Images

UIG865101: Portrait of Ellis Ashmead-Bartlett / Bridgeman Images

UIG865104: Henry Burton (1578-1648) (engraving), Hollar, Wenceslaus (1607-77) (after) / Bridgeman Images

UIG865108: Otto von Bismarck / Bridgeman Images

UIG865110: Portrait of Jagadis Chandra Bose / Bridgeman Images

UIG865112: Portrait of Germ / Bridgeman Images

UIG865118: Portrait of R.G. Boscovich / Bridgeman Images

UIG865121: Portrait of Paul Bert, 1886 (engraving) / Bridgeman Images

UIG865124: Portrait of Ludwig van Beethoven / Bridgeman Images

UIG865128: House in which Admiral Benbow was born / Bridgeman Images

UIG865130: Portrait of William Braidwood, 1819 (engraving) / Bridgeman Images

UIG865148: Christoph Hendrick Diderick Buys-Ballot / Bridgeman Images

UIG865160: Cartoon of Ellis Ashmead-Bartlett, Sambourne, Edward Linley (1844-1910) / Bridgeman Images

UIG865161: Cartoon of Frederick Settle Barff) in the Punch's Fancy Portraits series, London, 20 May 1882 (engraving), Sambourne, Edward Linley (1844-1910) / Bridgeman Images

UIG865162: Cartoon of John Bright, Sambourne, Edward Linley (1844-1910) / Bridgeman Images

UIG865168: Gebhardt Lebrecht von Blucher (1742-1819) / Bridgeman Images

UIG865171: Nicholas Boileau-Despreaux / Bridgeman Images

UIG865173: Portrait of Hans von Bulow / Bridgeman Images

UIG865180: Natural sciences and Philosophy / Bridgeman Images

UIG865184: Louis-Philippe (1773-1850) in Switzerland teaching geography and mathematics (engraving) / Bridgeman Images

UIG865194: The Great Vampire Bat from Guyana / Bridgeman Images

UIG865197: Thomas Lauder Brunton (1844-1916) / Bridgeman Images

UIG865200: Robert Brown (1773-1858) / Bridgeman Images

UIG865202: John Tyndall (1820-1893) / Bridgeman Images

UIG865207: Tycho's map of the island of Hven, Denmark / Bridgeman Images

UIG865219: Giovanni Boccaccio de Certaldo (1313-75) / Bridgeman Images

UIG865229: Planetary figure of Venus. From ''Sphaera mundi'', Strasburg, 1539. / Bridgeman Images

UIG865231: Zodiac sign of Aries. From ''Sphaera mundi'', Strasburg, 1539 / Bridgeman Images

UIG866234: This image of the crescents of volcanic Io and more sedate Europa was snapped by New Horizons' color Multispectral Visual Imaging Camera (MVIC) / Bridgeman Images

UIG866240: This montage shows the best views of Jupiter's four large and diverse "Galilean" satellites as seen by the Long Range Reconnaissance Imager (LORRI) / Bridgeman Images

UIG866243: The distinctive curve of Cape Cod, Massachusetts and the greater Boston urban area. February 12, 2000. Satellite image. / Bridgeman Images

UIG866245: This montage compares New Horizons' best views of Ganymede, Jupiter's largest moon. LORRI. / Bridgeman Images