Friday, October 28, 2005

Evolutionary mystery

Seeing as this stupid site is not letting me upload any photos anymore I will leave you with an evolutionary question I have never manage to figure out: Why is yawning contagious? In what evolutionary context did it develop?

2 Comments:

Anonymous Anonymous said...

Contagious yawning evolves in the first social groups.
It was useful to synchronize new activity cycles that are in the common interest of the group.
Light to dark transitions might be the primary "synchronizer“ for the circadian rhythm of yawning, as the frequency of yawns noted around such transitions is significantly higher than the uniform distribution of yawns over the course of a day.
More
here

APR

4:13 pm  
Blogger Wonko the Sad Clown said...

But what would be the point of synchronizing slepp patterns? Surely it is makes little evolutionary for all members of a group to fall asleep at the same time. I would think that an turn based sleeping pattern would be more advantageous, no?

3:42 pm  

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