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Why Do We Yawn? - Health - Nairaland

Nairaland Forum / Nairaland / General / Health / Why Do We Yawn? (370 Views)

Why Do People Yawn At The Same Time / 4D Scans Show Fetuses Yawn In The Womb / How Often Do You Yawn? (1) (2) (3) (4)

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Why Do We Yawn? by 9jamum(f): 11:22am On Nov 26, 2011
Is it because one is being tired, bored or oxygen deprived, or low temperature of the brain?
What is excessive yawning?

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