[Magazine] Scientific American. 2002. Vol. 286. No 1

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Extra info for [Magazine] Scientific American. 2002. Vol. 286. No 1

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Our first cloning attempt occurred last July. The timing of each attempt depended on the menstrual cycles of the women who contributed eggs; the donors had to take hormone injections for several days so that they would ovulate 10 or so eggs at once instead of the normal one or two. We had a glimmer of success in the third cycle of attempts when the nucleus of an injected fibroblast appeared to divide, but it never cleaved to form two distinct cells. So in the next cycle we decided to take the tack used by Teruhiko Wakayama and his colleagues, the scientists who created the first cloned mice in 1998.

Those prominences owe much to the magnetic field in the solar atmosphere. Could it be that magnetic activity dominates our galaxy’s atmosphere, too? If so, the analogy between galactic atmospheres and their stellar and planetary counterparts may be even more apt than we think. MORE TO E XPLORE Ionizing the Galaxy. Ronald J. Reynolds in Science, Vol. 277, pages 1446–1447; September 5, 1997. Far Ultraviolet Spectroscopic Explorer Observations of O VI Absorption in the Galactic Halo. Blair D. Savage et al.

What We Did W E L A U N C H E D O U R A T T E M P T to create a cloned human embryo in early 2001. We began by consulting our ethics advisory board, a panel of independent ethicists, lawyers, fertility specialists and counselors that we had assembled in 1999 to guide the company’s research efforts on an ongoing basis. Under the chairmanship of Ronald M. Green, director of the Ethics Institute at Dartmouth College, the board considered five key issues [see box beginning on page 48] before recommending that we go ahead.

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