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Peter Ratcliff uses dendrochronology — tree-ring dating — to pin down the age and suggest the provenance of stringed instruments. As he prepares to speak at the Woodmusick instrument identification conference in Cremona, Italy, on 30 September, he talks about the science of spotting fakes, and the 14 Stradivarius instruments made from the same spruce tree.
Best-selling science-fiction writer Neal Stephenson's works cover everything from cryptography to Sumerian mythology. Ahead of next year's novel Seveneves, he talks about his influences, the stagnation in material technologies, and Hieroglyph, the forthcoming science-fiction anthology that he kick-started to stimulate the next generation of engineers.