Did you know? Height of Olympus Mons (Mars) (21.9 km) is 20 x Height of Table Moutain, Cape Town (1.085 km)
Mass of a medium-sized apple (fruit) (68 g)
/fact/mass-of-a-medium-sized-apple-fruit
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.