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Tuesday, October 7, 2008 |
Tuesday, October 7, 2008 |
Photo: Naked Mole Rats Unable to Feel Burning PainThe hairless animals may have evolved this ability due to their tight-knit, carbon-dioxide-rich living quarters, scientists suggest. That's because the gas can break down and turn to acid, which would otherwise create an irritating atmosphere for the underground-dwelling mammals. Photograph courtesy Kathryn Marchetti/UIC Photo Services
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