Zoology CHRONOBIOLOGY Researchers come together to reveal the circadian rhythms of tuco-tucos PALEONTOLOGY 3D reconstructions highlight new characteristics of dinosaurs PALEOBIOLOGY Fossilized burrows suggest complex organisms arose before the Cambrian BIOLOGY Bees and ants recognize each other through compounds that cover their bodies BIODIVERSITY An effort has mapped the global distribution of 10,064 reptile species BIODIVERSITY Nearly 400 new species are discovered in the Amazon PHOTOLAB At the bottom of the Amazon ECOLOGY Cleaner fish obtain food by removing parasites from larger fish BIODIVERSITY The average size of the tambaqui has halved and it is less frequently caught PHOTOLAB Tracked in movement BIODIVERSITY Insecticides that coat commercial seeds are affecting bee populations PHOTOLAB The comforts of home ZOOLOGY Genetics explains color of seedeater plumage and atrophied wings of cormorants BIOLOGY Nearly half of the bat species in Brazil live in cities ECOLOGY Inventory finds unexpected species diversity in the São Paulo capital Anteriores