Captions for the three images by George Hart:

1) The red salamanders sculpture is a seven-inch acrylic model, which will be on display at the Bridges art exhibit.

2) The group shot shows the sculpture "Salamanders" (which is the topic of my talk) and the folks who helped me build it at a sculpture barn raising when I was artist-in-residenceat MIT.

3) "Compass Points" is a new sculpture I will also show at my talk, installed at Billy Joel Park in Cold Spring Harbor, New York. 

There is more about it here:
http://www.georgehart.com/sculpture/compass-points-large.html