Reviews & Previews
Fifty Machines That Changed the Course of History by Eric Chaline
Review key inventions of the 19th and 20th centuries, from bicycles to the Underwood typewriter.
Firefly, 2012, 224 p., $29.95
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Magazine
In the July 6 SN: Celebrating the 50th anniversary of Apollo 11, stone tool dates face scrutiny, ocean plastic goes deep, records of Inca taxation, erosion spurred plate tectonics and more.
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