Contents

19 December 1997
Vol 278, Issue 5346

About The Cover

Identical sheep face the future. Photographically reproduced Finn-Dorset sheep illustrate the power of cloning, which is the Breakthrough of the Year for 1997. See the Breakthrough of the Year special section beginning on 2038 and the Editorial on 2029. Also, six new transgenic sheep clones, two carrying the gene for the human factor IX protein, are described in a Report on 2130. [Photographic illustration: Ann Elliott Cutting]