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OBSAH
Our hosts discover the strength of the earth, how to measure it and figure out where they are going to? Plus de-mystifying an ancient Chinese abacus and how it beats a calculator hands down!
ŘADA: 1
Our hosts discover the strength of the earth, how to measure it and figure out where they are going to? Plus de-mystifying an ancient Chinese abacus and how it beats a calculator hands down!
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