November Gallery
Available as Framed Prints, Photos, Wall Art and Gift Items
Choose from 15 pictures in our November collection for your Wall Art or Photo Gift. Popular choices include Framed Prints, Canvas Prints, Posters and Jigsaw Puzzles. All professionally made for quick delivery.
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Us-Hubble Telescope
This file photo shows the Hubble Space Telescope as it was deployed from the Space Shuttle Discovery 25 April 1993. The Space Shuttle Endeavour is scheduled for launch 01 December to repair the orbiting observatory. / AFP PHOTO / NASA
© Agence France-Presse (AFP) - All Rights Reserved
Afp, Galaxy, Hubble, Space Shuttle, Square, Telescope

Streptococcus mutans bacteria on tooth
Streptococcus mutans bacteria. Coloured scanning electron micrograph (SEM) of Streptococcus mutans bacteria adhering to the enamel of a tooth. At top is a typical chain of these Gram-positive, non- motile, spherical bacteria. Lower down (white) is dental enamel. Streptococcus mutans is a major cause of tooth decay and one of the principal bacteria that cause plaque formation on teeth. It produces dextran, the adhesive glucose which makes up plaque. Within plaque, bacteria produce large amounts of lactic acid, causing demineralization of the tooth enamel and dentine, resulting in caries (tooth decay). Magnification: x20, 000 at 6x7cm, x11, 000 at 35mm size. x63, 000 at 8x10ins
© DR KARI LOUNATMAA/SCIENCE PHOTO LIBRARY