Why do wires tangle?

Why do wires tangle? How are mountains formed? Is borehole water drinkable?
25 September 2015
Presented by Chris Smith, Redi Tlhabi

Tangled headphones

Tangled headphones


Why do wires tangle? Is borehole water drinkable? Does sea water evaporate? Why are there no more intelligent hominids except humans? How are mountains formed? What makes up non-stick linings on frying pan and are they safe? Plus, the Volkswagen emissions scandal.


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