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Yawning may keep us 'on the ball'

http://news.bbc.co.uk/2/hi/health/6268428.stm

Yawning sent cooler air to the brain, helping it to stay alert. ... The desire to yawn when others do so may also be a mechanism to help a group stay alert in the face of danger.

http://news.bbc.co.uk/2/hi/health/6268428.stm

2007-07-04

yawning brain attention

Beetle's beer bottle sex wins Ig Nobel Prize

http://www.bbc.co.uk/news/science-environment-15117051

2011-09-30

Ig Nobel Prize humour science sex yawning beetle bottle incredible