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In this combo of images from video provided by Dartmouth College, a climber ascends an outdoor rock face, left, on Dec. 12, 2015 in Rumney, N.H., and another climber ascends a replica indoor climbing wall, right, on Jan. 16, 2016, in Hanover, N.H. Using three-dimensional geometry, the three-dimensional replica of the rock wall was created by tracking a climber's hand and foot positions and by estimating the contact forces. (Christos Mousas/Dartmouth College via AP)

In this combo of images from video provided by Dartmouth College, a climber ascends an outdoor rock face, left, on Dec. 12, 2015 in Rumney, N.H., and another climber ascends a replica indoor climbing wall, right, on Jan. 16, 2016, in Hanover, N.H. Using three-dimensional geometry, the three-dimensional replica of the rock wall was created by tracking a climber's hand and foot positions and by estimating the contact forces. (Christos Mousas/Dartmouth College via AP)

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