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1 December SI

AMERICAN ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE

COVER

Adult female spider, Araneus diade-matus Cl. The eight legs perform different tasks. Here the left hind leg pulls out polypeptide silk from the spinnerets at the rear end of the body; the right hind leg probes in the air: the middle legs support the body; and the front legs “measure” distances and tension. (Actual size 20 millimeters, rear view). See page 1216. [Peter N. Witt, North Carolina Department of Mental Health]

WEB BUILDING

SCIENCE