How does snake venom work?

30 March 2012
Presented by Chris Smith, Redi Tlhabi.

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What substances are in snake venom? Where is sea-level measured? Are any of my cells the original ones I was born with? Are we seeing the effects of global warming? How does planetary precession work? How do bullets do damage? How can you tell when a melon is ripe? Why are men so stubborn? Plus, how fossilised raindrops are shedding light on what Earth's atmosphere was like 3 billion years ago...

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