The Tipping Point of Rocks

The Tipping Point of Rocks
“I NEVER thought I could do that!”

Zach Pine has heard that exclamation many times in his work as an informal educator. Not surprising, since Pine continually challenges both children and adults to succeed at something they thought was impossible. What challenge does Pine present his learners? To balance rocks of all shapes and sizes, one atop another in a free form sculpture, without any other means of support like sticks, clamps, or glue.

“When I first introduce this activity, people instinctively say ‘But that’s defying the laws of gravity!’ My answer is that rock balancing is actually using the laws of gravity, and I can teach them how.”

The “secret” Pine teaches is finding each rock’s center of gravity and its “tripod”—a phy…
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