Famine reveals incredible shrinking iguanas

Marine iguanas in the Galápagos Islands are the first vertebrates shown to shorten and then regrow, say researchers in the United States and Germany.

The seagoing reptiles shrank by as much as 20 percent during a 2-year food shortage inflicted by El Ni±o, says Martin Wikelski of the University of Illinois at Urbana-Champaign.