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LettersThis Week's LettersIn light of the 1998 Nobel Prize for Physiology or Medicine for the discovery that nitric oxide is a signaling molecule in the cardiovascular system, a plant biologist points out that ethylene was recognized as a gas that affects growth in 1901 and as a signal molecule produced by plant cells in 1934. An Indian geologist reports a discovery that calls into question a recent finding of "more than 1-billion-year-old triploblastic animal trace fossils from...Chorhat Sandstone...of central India." Faculty at the recently sold Allegheny University of the Health Sciences express concern about their status. "Omic" research is discussed. A way to give scientific advice to the U.S. Department of State is proposed. And a Paraguayan rain-forest tribe is declared not "vanished."
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