Ecosystems

  1. Ecosystems

    Males live longer with all-year mating

    Male butterflies live longer in Madeira, where females are available year-round, than in Sweden, where females mature in one burst.

    By Susan Milius
  2. Ecosystems

    Famine reveals incredible shrinking iguanas

    Marine iguanas in the Galápagos Islands are the first vertebrates known to reduce their size during a food shortage and then regrow to their original body lengths.

    By Susan Milius