![](http://1.bp.blogspot.com/_E-QOnTGFX_o/Rs304YNMUpI/AAAAAAAABpg/XMK5_z2u97A/s320/washboard.jpg)
Up in the area where we vacation, a couple of dirt roads form part of the boundaries of the property. Last time we were there, I commented on the "washboard road" and we had some discussion about what makes the washboarding appear. Now, a couple of scientists have a theory, which can be found at Road Bumps: Why dirt roads develop a washboard surface.
Cool.
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