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Why the earth is pear-shaped, Newton's first law and the formula for gripe water occupy Dr Karl and Dr Rhod this week. They're joined by Brian Dunning who takes a look at what makes a quadrillion.
By BBC Radio 5 Live4.5
107107 ratings
Why the earth is pear-shaped, Newton's first law and the formula for gripe water occupy Dr Karl and Dr Rhod this week. They're joined by Brian Dunning who takes a look at what makes a quadrillion.

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