2/25/2011 6:53:15 AM
BBC News -- Scientists in the United States have found newborn mice can re-grow their own hearts. The mice had a large chunk of their heart removed a day after birth, only for the heart to restore itself within three weeks. Fish and amphibians are known to have the power to re-grow heart tissue, but the study in Science is the first time the process has been seen in mammals.
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