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05 February 1993
Vol 259, Issue 5096

About The Cover

Displaying Archaeopteryx in a Late Jurassic ginkgo tree. Although Archaeopteryx has been envisioned as a cursorial predator, evidence from claw geometry suggests that Archaeopteryx was primarily an arboreal bird and a trunk-climber and does not represent a terrestrial stage in the evolution of avian flight and feathers. See page 790. [Acrylic painting: John P. O'Neill]