Did you know? Mass of world silver production (2014) (26 million kg) is 4 thousand x Mass of the James Webb Space Telescope (6,500 kg)
Length of I-90 highway from Boston to Seattle (4,860 km)
/fact/length-of-i-90-highway-from-boston-to-seattle
Link
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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Click here for Podcast: Andrew Elliott interviewed for New Books Network.