Apparently you can tell a lot about someone by the way they yawn
Yawning – you might never have thought about it while you were trying to stifle that yawn in your meeting this morning, but it’s something that the majority of the animal world does.
Which is why scientists were able to conduct this latest study and deduce that the length of your yawn says a lot about the size of your brain.
The study, published in Biology Letters, showed a correlation between yawn duration and brain weight, as well the number of cortical neurons i.e. the number of cells in the cerebral cortex, the brain’s largest region.
They found that mammals with larger brains yawned... read more
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