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About the Cover

Cover Figure


COVER A late-stage Xenopus tropicalis (western clawed frog) tadpole, about 5 centimeters in length, with emerging hindlimbs. Through the skin of the head, the optic, trigeminal, and olfactory nerves, as well as the paired thymus and large blood vessels, are visible. A Report on page 633 describes the genome of this organism, which is an important model for vertebrate development. Photo: Siwei Zhang, Jingjing Li, Enrique Amaya

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Science. ISSN 0036-8075 (print), 1095-9203 (online)