Did you know? Length of the Mississippi River (3,730 km) is 20 x Length of the M25 Orbital motorway around London (188 km)
Mass of all the asteroids in the Asteroid Belt (3 sextillion kg)
/fact/mass-of-all-the-asteroids-in-the-asteroid-belt
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.