On a remote island in Brazil, the sun began to set, and a color-changing creature began its nightly transformation. Its skin shifted hues, its pattern morphed but its green bones stayed the same.

Scientists found a color-changing animal with green bones on an island in the Amazon rainforest and discovered a new species, a study said. Photo from Ferrão, Hanken, Oda, Campião, Penhacek, Anjos and ...