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Brian Cox: 鈥淏igger means longer life-span鈥�
Professor Brian Cox and Robin Ince with guests comedian Andy Hamilton and material scientist Mark Miodownik discuss whether size really does matter in the animal kingdom. They discover that the bigger the mammal the longer its life-span will be, with all having an average of 1.5 billion heart-beats in a life time.
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It's a middle-aged star, about 4.5 billion years old...
Duration: 01:15
