Scientists announced the first successful cloning of a U.S. endangered species: a black-footed ferret.
The animal, named Elizabeth Ann, was born Dec. 10 and announced Thursday. Willa, the ferret who served as the genetic source for Elizabeth Ann, died in 1988 and remained frozen as cloning research was just getting underway.
The success gives conservationists hope to see other species returned to the wild, though the process will require patience. The process required the use of a tame domestic ferret, and a second clone did not survive.
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