NPR's Joe Palca has a report on the apparent failure to reproduce the experiment that created Dolly, the world's first cloned sheep. In one sense it's not surprising -- it took Scottish scientists nearly 300 attempts before Dolly was cloned, a time consuming process that involves many animals and many years. But there also appears to be relatively little interest among scientists to try to reproduce the experiment - an experiment that is necessary to prove that Dolly isn't a fluke.
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