鈥淥ur security is threatened by a problem at least as dangerous as chemical, nuclear or biological weapons, or indeed terrorism: human-induced climate change.鈥�
Former head of the UK鈥檚 Met Office John Houghton (The Guardian, London, 28 July)
鈥淚 don鈥檛 feel any more special than anyone else, just normal.鈥�
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Louise Brown, the first test-tube baby, on her 25th birthday (Independent on Sunday, London, 27 July)
鈥淚 think the most compelling reason is that people aren鈥檛 scared any more.鈥�
Director of the US National Center for HIV, STD and TB Prevention Harold Jaffe on the rise in new AIDS cases in the US (Washington Post, 28 July)
鈥淭he modern cigarette does to nicotine what crack does to cocaine.鈥�
Jack Henningfield of Johns Hopkins University School of Medicine in Maryland on a study showing why some cigarettes are so addictive (Oregon Health & Science University press release, 24 July)
鈥淚t鈥檚 too late now. If we try and move it, it will break into a thousand pieces.鈥�
La Rochelle museum director Patrick Schnepp on the demise of the Calypso, flagship of undersea explorer Jacques Cousteau (The Guardian, London, 27 July)
鈥淭he bit I love most is the second before jumping when you know it can all go wrong.鈥�
Base jumper Felix Baumgartner, before his attempt to 鈥渇ly鈥� across the English Channel after leaping from a plane 10,000 metres above Dover (The Daily Telegraph, London, 29 July)