Premature aging of Dolly, the cloned sheep, seen as an anomaly
In 2002, when Dolly the sheep, the first truly cloned mammal, died at age 6, scientists studied her telomeres — the structure at the end of DNA strands that shorten with age — and found that Dolly’s were much shorter than they should be. Initially, scientists thought this meant clones would age prematurely, following the biological… » Read More
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