Why pulling nose hairs makes you cry?

Why tugging on nasal hairs causes crying? What triggers static shocks? Why are computers based around binary? What are blood groups?

11 October 2013

Presented byChris Smith.

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Credit:

LHOON @ wikipedia

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Why tugging on nasal hairs causes crying? What triggers static shocks? Why are computers based around binary? What are blood groups? How can babies have 3 parents? Why is yawning contagious? What happens to excess skin when a person slims? When is a hot bath too hot? Why are some infections more common in winter?