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Volume 436 Number 7047 pp1-150 In this issue (7 July 2005) • • • • • • • • • Editorials Research Highlights News News Features Business Correspondence Books and Arts • • • • • • • • • Essay News and Views Brief Communications Mars: News and Views Mars: Analysis Mars: Articles Mars: Letters Articles Letters Naturejobs Futures Editorials Climate of distrust p1 Six months into President George W. Bush's second term of office, partisan politics continues to widen the gulf between researchers and the administration. Rules of engagement p2 Biologists may soon have little option but to sign up to codes of conduct. Playing the name game p2 Stem-cell biologists should not try to change the definition of the word 'embryo'. Research Highlights Research highlights p4 News Flu officials pull back from raising global alert level p6 Conflicting results from Vietnam cause concern. Declan Butler Climate change: is the US Congress bullying experts? p7 Climate chief Rajendra Pachauri responds to US demands for information. Parasite infiltrates fruitfly research p8 Geneticists fear Drosophila results skewed by unnoticed bacterium. Claire Ainsworth Stem-cell 'heroes' celebrate a series of breakthroughs p9 With fresh initiatives and funding the future is bright, say researchers. Erika Check Sidelines p10 Scientists finally get their hands on Kennewick man p10 Bone studies and DNA tests will help determine the origins of the 9,000-year-old skeleton. Rex Dalton US willing to pay for Russia's help in space p11 Anti-Iran legislation set to be loosened for fresh deal on space station services. Tony Reichhardt Genetic patent singles out Jewish women p12 European ruling on test for breast cancer gene slammed as discriminatory. Alison Abbott News in brief p13 News Features Conservation biology: Is this any way to save a species? p14 Thanks to the influence of a powerful US