Did you know? Height of Olympus Mons (Mars) (21.9 km) is 2 x Depth of Marianas Trench (10.99 km)
Mass of a barrel of crude oil (159l) (139 kg)
/fact/mass-of-a-barrel-of-crude-oil-159l
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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.