Colon cancer. Coloured X-ray of colon cancer revealed by a barium enema. The cancer itself is not seen, but it narrows the lumen of the colon, producing the characteristic apple core" narrowing seen at centre (green wisps). A solution of a barium salt was introduced into the rectum. It is opaque to X-rays, and appears white (lower left). In a normal colon, the barium would flow up the rectum into the sigmoid colon, but here it is blocked by the cancer, leaving the sigmoid colon empty (black, upper right). Colon cancer is relatively common, and is thought to be linked to a high fat, low fibre diet."
Science Photo Library was founded in 1981 by Michael Marten, one of the authors of "Worlds Within Worlds", a book exploring different ways to observe the universe - from electron micrographs, to images of earthrise taken from the Apollo spacecraft. When Marten started receiving requests for the beautiful images in the book, he had an idea of setting up Science Photo Library.
Since then, Science Photo Library has continued to work alongside world acclaimed photographers and the leading science and medical experts to provide a central source of the best science and specialist imagery available. Although the collection started with scientific images, it has grown to encompass all aspects of science and their impact on everyday life.
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