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Time since earliest wheeled vehicles (4,000 y) is 25 x Time since the publication of Dickens's Tale of Two Cities (160 y)
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Fastest speed attained by a manned rocket sled (1,017 km/h)
If this was a standard unit ...
"This is a fun and riveting book. Written in an accessible and engaging way, it is unputdownable." Frost Magazine
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