20 Years Since 'Dolly'
It was 20 years ago this week that scientists announced the first successful cloning of a mammal — the now-famous sheep Dolly — from a cell taken from an adult animal.
The cloning of Dolly by the team at The Roslin Institute, at the University of Edinburgh in Scotland, paved the way for researchers to try cloning a number of other mammals. Prior to Dolly, scientists had been able to clone mammals only by splitting growing embryos.
Since the announcement of Dolly's birth, dozens of other species have been cloned from adult body cells, including many mammals. Here are eight of the mammals that have been cloned in this manner since Dolly:
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