1st collector for Science VideoLab: Clever Crows
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http://video.sciencemag.org/VideoLab/609859393001/1 New Caledonian crows are renowned for their ability to craft, modify, and use tools [see previous video]. Now, Rutz et al. provide an explanation for this remarkable ability -- by comparing the stable-isotope profiles of crows’ tissues with those of their food sources, they found that tool use materially enhances the crows' diet and, therefore, may improve their evolutionary fitness. In this narrated video, author Christian Rutz explains how the crows extr
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