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New findings about ocean currents in the Pacific Ocean and El Niño events that start there. How natural tricks of butterflies could defeat forgers and make safer banknotes. The medical implications of being able to write with thin lines of protein on gold leaf with an atomic force microscope. Using information technology and genomes to identify species instead of appearance. Max Perutz, "father of molecular biology" and Nobel prize laureate for his work on the structure of haemoglobin, died this week.