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Length of the longest canal tunnel (Rove Tunnel in France) (7.12 km) is 2.5 thousand x Length overall of a `RS:X` windsurfing board (2.86 m)
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Time since the earliest farming (11,500 y)
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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