Anniversary of Dolly the Cloned Sheep

Today is the 20th anniversary of the birth of Dolly, the first mammal cloned from an adult somatic (non-reproductive) cell using the process of nuclear transfer. Dolly was the only lamb to survive of 277 attempts at the time, but cloning is now much more efficient. Cloning may be useful in bringing back endangered or even extinct species in the future.

Dolly the Sheep

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