How do planes stay in the air?

Why don't teeth grow back? Why are feathers more colourful than fur? and how do racing pigeons navigate home?...
23 February 2018
Presented by Chris Smith

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Plane in flight

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How does a plane take off and fly without falling? Why are feathers more colourful than fur? Why don't teeth grow back? How do male seahorses carry babies? Plus, using organoids to test cancer therapies...

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