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Robert Sullivan, In The Alleys With 'Rats'

11:36
    "Rats teeth can bite through metal and concrete. There's a scale called Mohs Scale of Hardness, and they're a 5.5. And that's better than steel." (AP Photo)
    "Rats teeth can bite through metal and concrete. There's a scale called Mohs Scale of Hardness, and they're a 5.5. And that's better than steel." (AP Photo)

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