Thursday, November 07, 2013

[ilyxaeva] Flat lap

How good are we at adjusting the position of our legs while sitting to create a level horizontal lap surface?  Can we do it without an object sitting on it, or do we rely on differential pressure or shear frictional forces of the object threatening to slide off?

One could imagine an evolutionary mechanism for which the lap was useful place to temporarily leave something without having to hold it with hands.  Perhaps a baby.

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