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        Bird Extinctions: Time Travel through Lava Tubes | Smithsonian Science How

        Examine how a species as abundant as the passenger pigeon (Ectopistes migratorius) could have gone extinct. Meet Dr. Helen James, an ornithologist at the National Museum of Natural History. Analyze their disappearance and consider what factors make birds vulnerable to extinction. Follow Helen into Hawaiian lava tubes to look for prehistoric evidence of bird life on the islands. See which species survived and which did not after humans arrived on the scene. Use modern tools and technologies to interpret bird extinctions.

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