Did you know? A light year (9.46 trillion km) is 4 thousand x Diameter of the star UY Scuti, largest known star (2.377 billion km)
Number of submarines in the North Korean Navy (2023) (35 )
/fact/number-of-submarines-in-the-north-korean-navy-2023
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"This is a fun and riveting book. Written in an accessible and engaging way, it is unputdownable." Frost Magazine
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