What is Colourblindness?

24 May 2013
Presented by Chris Smith.

What is genetic diversity? What causes colourblindness? Why does a microwave turntable sometimes rotate in the opposite direction? How are genes linked to behaviour? How accurate are different dating methods? Where does sleep in your eyes come from? And how does an aeroplane wing work? Join Dr Chris for another top clutch of questions from South Africa...

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