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Saturday, September 23, 2006

Tuberculosis Helped Bring Down Mastodons:
"Scientists examining mastodon skeletons found a type of bone damage in several of the animal's foot bones that is unique to sufferers of tuberculosis. The disease would have weakened and crippled the animals, making them more vulnerable to humans and climate change, two factors that scientists have long speculated were behind their extinction in North America."

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