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What's the good of multi-vitamins?
Dr Karl and Dr Rhod are joined by Alastair Reynolds, a sci fi author and former European Space Agency scientist.
Topics under the spotlight are: the science of toenails, how being in space affects astronauts and what's the good of multi-vitamins?
Podcast
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5 Live Science Podcast
The hottest science news, stories and analysis from Dr Chris and the Naked Scientists.
