I'm currently working on the January Challenge from IBM Ponder. After spending a little time on the problem, I decided I needed to change gears, so I solved and submitted NPR's Sunday Puzzle, which was remarkably easy. I hope they don't call!
Sometimes you just have to change your focus.
On my way home I spent an inordinate amount of time trying to use panorama mode to map out the trunk of the Tree of Science. Straightforward efforts seem to totally confuse the iPhone's stitching algorithm (computer scientists might think about this). So, instead, I turned the camera on its side and got this upward panorama:
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| Tree of Science |

