POWER AND SYRED / SCIENCE PHOTO LIBRARY POWER AND SYRED / SCIENCE PHOTO LIBRARY
Roasted coffee bean. Coloured scanning electron micrograph (SEM) of a roasted bean of the coffee plant (Coffea sp.). This bean contains the stimulant drug caffeine. This, and other soluble chemicals, are extracted from ground roasted coffee beans using hot water, and drunk as a beverage. Magnification: x7.4 when printed at 10 centimetres wide.
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