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In this new series, mathematician Dr Hannah Fry explores the mystery of math. It underpins so much of our modern world that it's hard to imagine life without its technological advances, but where exactly does math come from? Is it invented like a language or is it something discovered and part of the fabric of the universe? It's a question that some of the most eminent mathematical minds have been wrestling with. Dr Eleanor Knox from King's College London believes it's discovered, Prof Hiranya Peiris from University College London believes it's invented, while Prof Jim Gates from Brown University believes it's both, and Prof Brian Greene from Columbia University has no idea. The jury is very much divided. To investigate this question, Hannah goes head first down the fastest zip wire in the world to learn more about Newton's law of gravity, she paraglides to understand where the theory of math and its practice application collide, and she travels to infinity and beyond to discover that some infinities are bigger than others. In this episode, Hannah goes back to the time of the ancient Greeks to find out why they were so fascinated by the connection between beautiful music and math. The patterns our ancestors found in music are all around us, from the way a sunflower stores its seeds to the number of petals in a flower. Even the shapes of some of the smallest structures in nature, such as viruses, seem to follow the rules of math. All strong evidence for math being discovered. But there are those who claim math is all in our heads and something we invented. To find out if this is true, Hannah has her brain scanned. It turns out there is a place in all our brains where we do math, but that doesn't prove its invented. Experiments with infants, who have never had a math lesson in their lives, suggests we all come hardwired to do math. Far from being a creation of the human mind, this is evidence for math being something we discover. Then along comes the invention of zero to help make counting more convenient and the creation of imaginary numbers, and the balance is tilted in the direction of math being something we invented. The question of whether math is invented or discovered just got a whole lot more difficult to answer.
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