I went away this past weekend for a private retreat after ScienceOnline2012. During some of the time I worked on balancing some rocks. These rocks are smooth, round, river rocks and are much more difficult to balance than the rocks I usually try to balance. I love the focus that it takes. I close my eyes and “feel” the weight of the rocks, move them until they “sink” into balance with gravity. Simple pleasures. Fleeting works of art (the wind or other vibrations will knock them over soon enough).

Looks simple... but there is only a small area of contact.

Here's the point of contact. Kind of like balancing two balls.