Science Podcasts

Naked Scientists episode

Sun, 4th Nov 2007

In Search of Eden: The Origin of Man

Homofloresiensis (c)

This week on the Naked Scientists we’re taking the ultimate road trip – following the spread of humans across the globe. We’re joined by Jenny Collier to discuss how an enormous flood cut Britain off from Europe, sparking thousands of years of jokes and grudges in the process.  Chris Turney will be here to explain how you date a Hobbit, using radiocarbon rather than romantic means.

We’ll also be looking at the history of fire, discussing recent evidence that early man could have kept his toes warm at the hearth 1.5 million years ago.  Meanwhile here in the present day, Kitchen Scientists Ben and Dave have a go at making fire the old-fashioned way.

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In this edition of Naked Scientists

Full Transcript

  • 13:44 - Why do we get wrinkles?

    If our skin is always regenerating, why do we get wrinkles?

  • 14:37 - Why is it recommended to put salt on cuts?

    Why is it recommended to put salt on cuts? It seems to be popular advice with dealing with cuts on the inside of your mouth, for example, but what’s really happening and is using salt actually a good idea?

  • 18:06 - Jumping Flames

    Make a flame jump several centimetres using just a humble candle.

  • 20:04 - Over Everest

    It seems that it’s no longer impressive just to have been able to climb mount Everest; now the goal is to fly over it! We spoke to Giles Cardozo and Bear Grylls...

  • 45:05 - Energy of Light

    If the speed of light is slower in glass than in air, where does the energy come from to speed it up as it exits the glass into air? Why does this not violate the law of conservation of energy?

  • 54:26 - Why are there apes in the zoo?

    Why are there apes in the zoo? Why does one ape decide, ‘I fancy being a man,’ and another genus of ape says, ‘I’m quite happy being an ape'?

 

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