Images Dated 2nd October 2002
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Choose from 20 pictures in our Images Dated 2nd October 2002 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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Featured 2 Oct 2002 Print
Skate collected for research
Skate specimen. Researcher's gloved hands holding a skate (Raja erinacea) caught for use in biologi- cal research at the Woods Hole Marine Biology Laboratory (MBL) in Massachusetts, USA. The skate has eyes (not seen) unlike those of any other vertebrate, in that its retinas (light-sensitive membranes at the back of the eyeball) contain only rod cells. These are the light-sensitive cells that detect low light levels. Other vertebrates have both rods and colour-detecting cone cells in their retinas. Studying rods in isolation provides information on light/dark adaptation, and could lead to new ways of treating adaptation disorders such as night blindness and retinitis pigmentosa
© VOLKER STEGER/SCIENCE PHOTO LIBRARY
