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In most species, the body of an organism loses its innate ability to heal over time (salamanders are a notable exception). While a kid can skin her knee and not even remember it two days later, an adult might feel the effects for weeks. But what do we really know about aging? asks Douglas Melton in his Floating University lecture. Does the passage of time necessarily bring about an inevitable decline in physical stamina and recovery? Or might science be able to increase the quality, as well as the quantity, of our years?
