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COLUMNS
On Common Ground • Individuality
Cloning and the discomfiting cases of Siamese twins
Photographs by ROSAMOND PURCELL
Text by STEPHEN JAY GOULD
Cell Block
Moral relativism and news of practical benefits are nudging human cloning toward public acceptance, even as the first laws are written to ban it
BURKHARD BILGER
FEATURES
The Birth of Cloning
Contrary to the popular impression, Dolly did not spring full grown from Ian Wilmut's ingenuity
J.B. GURDON
Backward Compatible
Advances in cloning have shown that many kinds of cells can be "reprogrammed" to make an entire organism
MARIE A. DI BERARDINO and ROBERT G. MCKINNELL
Take Two
Have movies prepared us for the real thing?
M. Z. RIBALOW
What Good Is Sex?
Asexual reproduction has its temptations -- no hang-ups, no commitments, no condoms -- but only love can mend genetic parts
RICHARD E. MICHOD
Born Again?
Does Dolly the sheep bear the scars of her mother's aging DNA, or does cloning somehow restore genes to a state of infant grace?
RONALD HART, ANGELO TURTURRO AND JULIAN LEAKEY
Whenever the Twain Shall Meet
Studies of identical twins reared apart suggest how closely human clones might resemble their parents
THOMAS J. BOUCHARD JR.
Whose Self Is It, Anyway?
When would human cloning be a morally acceptable choice, and when a mere exercise in vanity?
PHILIP KITCHER
COLUMNS
Physica • Tiny Doubles
New states of matter, formed from particles more alike than any clone
HANS CHRISTIAN VON BAEYER
DEPARTMENTS
Initial Conditions • What Hath Wilmut Wrought?
PETER G. BROWN
Working Hypotheses • The Scent of Science
RODNEY W. NICHOLS
Peer Review
Letters from Readers
Quanta
Universal axis; levitating frog; dusting up the Sunshine State; atoms of memory; scientists keep the faith
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