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

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A study by Ralf-Jürgen Dettmar of the University of Bochum in Germany found that galaxies with a larger-than-average massive star population seem to have atmospheres that are more extended or puffed up. How the stars wield power over an entire galaxy is somewhat unclear, but astronomers generally pin the blame on the creation of hot ionized gas. This gas appears to be produced by the high-velocity (100 to INTERGALACTIC MEDIUM galactic w i nd s ds ou i n fa l l i n g cl RECYCLING OF GAS by the galaxy is analogous to the water cycle on Earth.

K. M. Ferrière in Reviews of Modern Physics, Vol. 73, No. 4 (in press). com SCIENTIFIC AMERICAN Copyright 2001 Scientific American, Inc. 43 EXCLUSIVE The First Human Cloned By Jose B. Cibelli, Robert P. Lanza and Michael D. West, with Carol Ezzell FIRST CLONED HUMAN EMBRYO consists of at least six cells. The genetic material of the embryo— and the ovarian cells sticking to it— appears blue here. Copyright 2001 Scientific American, Inc. Embryo Cloned early-stage human embryos— and human embryos generated only from eggs, in a process called parthenogenesis— now put therapeutic cloning within reach THEY WERE SUCH TINY DOTS, YET THEY HELD SUCH immense promise.

If women are offered payment to undergo these risks, might that cause human reproductive material to become viewed as a commodity that can be commercialized? We do not permit the sale of human organs or babies. Are eggs any different? In responding to these concerns, members of the board took note of two facts. First, a substantial market in human eggs for reproductive purposes already exists. Young women are being paid substantial sums to provide eggs that can help single women or couples have children.

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