Everyday Mysteries:Fun Science Facts

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Everyday Mysteries:Fun Science Facts From the Library Of Congress.

25 feb 2013 - Everyday Mysteries:Fun Science Facts
Why does chopping an onion makes you cry?
Onions produce the chemical irritant known as syn-propanethial-S-oxide. It stimulates the eyes lachrymal glands so they release tears.
(Recent Studies From Japan)

Q)Why do we yawn?
Yawning is linked to our circadian rhythms(biological activity related to a 24 hours cycle)as a signal to go to bed or as a waking ritual.
http://www.loc.gov>The Library of Congress>Research.Centres

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