Is the ice in the freezer edible?

How do doctors name phobias? Is the ice on the freezer sides safe to eat? What is the low-frequency hum I can hear? Is pipe tobacco tar good for cuts and sores? Why do birthmarks...
10 June 2011
Presented by Chris Smith, Redi Tlhabi

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How do doctors name phobias? Is the ice on the freezer sides safe to eat? What is the low-frequency hum I can hear? Is pipe tobacco tar good for cuts and sores? Why do birthmarks persist? What keeps the head so hot? Why are animals alarmed by loud noises? A bumper crop of science questions awaits Dr Chris in this week's Ask the Naked Scientists...

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