19th Century Peruvian Postman
Collection Abecasis/science Photo Library
Chang And Eng Conjoined Twins
Library Of Congress/science Photo Library
Sunspot Observed By John Herschel
Royal Astronomical Society/science Photo Library
Scheutz's Calculating Machine
Universal History Archive/uig
Thomas Grainger Stewart
Universal History Archive/uig
Etheldred Benett
Natural History Museum, London/science Photo Library
Map Of The Visible Side Of The Moon
American Philosophical Society
Franklin Silk Company Bank Note
American Philosophical Society
Inoculating Against Hydrophobia
Universal History Archive/uig
Large Frogmouth
Natural History Museum, London/science Photo Library
Sunspot Observations #8
Royal Astronomical Society/science Photo Library
Great Dust Heap
Wellcome Images/science Photo Library
Julius Caesar
Collection Abecasis/science Photo Library
Royal Exchange
Collection Abecasis/science Photo Library
First Morse Telegraph
Science Photo Library
Manual Labor Bank Note
American Philosophical Society
Large Magellanic Cloud
Robert Gendler/european Southern Observatory/science Photo Library
19th Century Chinese Opium Smokers
Collection Abecasis/science Photo Library
Edward Spencer
Library Of Congress
1837 Extinct Prehistoric Animals Paris
Paul D Stewart
Nasmyth's Steam Hammer, Artwork
Library Of Congress
Ancient Egyptian numerals, 19th century
Science Photo Library
William Smith, British geologist
Science Photo Library
1837 Babbage Calculating Machine Universe
Paul D Stewart
1837 Lesser Rorqual Whale Minke Whaling
Paul D Stewart/science Photo Library
1837 Bowhead Greenland Whale Whaling
Paul D Stewart/science Photo Library
1837 Extinct Prehistoric Animals Dorset
Paul D Stewart