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Thursday, Feb 14, 2002

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This week's questions

How does intake of common salt cause heart diseases?

S.Sangeetha, Chennai

How are optic fibres different from ordinary cables?

Kalyan, Vizag

How are 3-D films made?

S.Promeeth Medlatithi, A.P.

Why do some people drool while sleeping?

G.Surendra, Cuddapah

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Sci Tech

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