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33.0 x 43.9 cm ⏐ 13.0 x 17.3 in (300dpi)
GARY HINCKS / SCIENCE PHOTO LIBRARY GARY HINCKS / SCIENCE PHOTO LIBRARY
Miller-Urey experiment. Artwork of the apparatus used in the Miller-Urey experiment to study the origin of life. This 1950s experiment attempted to duplicate the conditions which would have existed on the primordial Earth. The apparatus contains a 'sea' of sterile water (bottom) and an 'atmosphere' of hydrogen, methane and ammonia (top right). Electrodes give off a spark (right) to imitate either lightning or ultra-violet radiation from the Sun. The result is a tar-like residue containing amino acids, the basic building blocks of life.
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