Play Live Radio
Next Up:
0:00
0:00
0:00 0:00
Available On Air Stations

When Is a Clone Really a Clone?

Cloning animals, like the Jersey cow at left, has proved to be very difficult. Cloning humans is turning out to be even harder. Despite claims that two maverick groups may have succeeded, the scientific world is skeptical. If a claim is made, scientists will be on the hunt for fakes. NPR's Joe Palca reports for All Things Considered.

Copyright 2002 NPR