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  1. Crows are well known to scientists for their ability to build and use tools.

    Crows are well known to scientists for their ability to build and use tools.

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  2. Are Crows the Ultimate Problem Solvers? | Inside the Animal Mind | BBC Earth

    Are Crows the Ultimate Problem Solvers? | Inside the Animal Mind | BBC Earth

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  3. Nine Roman, Visigoth tombs unearthed during construction work in Barcelona

    Nine Roman, Visigoth tombs unearthed during construction work in Barcelona

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