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LettersThis Week's LettersThe Dean of the Medical Faculty at Johns Hopkins defends the way his institution handles misconduct charges. Investigators who use phytolith analysis to date the origins of agriculture provide evidence that their methods are sound. Two researchers point out that the cement in Biosphere 2 did not cause significant oxygen loss. Environmental scientists question the wisdom of producing a second "green revolution," asking, "Shouldn't we be able to learn from our past mistakes?," while experts in photosynthesis discuss the importance of developing genetic techniques for manipulating chloroplast DNA in plants. Theoretical physicists describe their work on dark matter. And the park created in Seveso, Italy, after the accidental release of TCDD in 1976 is said to be a model for restoration ecology.
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Science. ISSN 0036-8075 (print), 1095-9203 (online)
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