Can I Crush my capsules?

22 October 2010
Presented by Chris Smith, Redi Tlhabi.

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What stops water moving through a tiny hole, are ground up tablets safe to swallow, what are freckles, how fast can a human heart beat, what happens when a cataract is removed, where do fat flies come from and how does the moon influence the Earth? Join Dr Chris as he pits his wits against this week's round up of science questions from South Africa...

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