Did you know?
Mass of a Block IIR GPS Satellite in orbit (1,080 kg) is 10 x Mass of Vespa Primavera 50 scooter (108 kg)
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Land used for permanent crops in Bulgaria (2011) (370 km^2)
"This is a fun and riveting book. Written in an accessible and engaging way, it is unputdownable." Frost Magazine
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