Other Stuff

On July 11, 2002, I had a picnic at my house. An hour or two before sunset, we saw a rare event---a rainbow straight over head. Actually, such a thing is correctly refered to as a circumzenithal arc. Coincidentally, Richard Gott was not at the picnic but saw the same event and took pictures of it:

On July 5, 2008, I took this picture of the Sun setting over Lake Michigan:

This picture might not seem like much. But, in fact I was able to use it to show that the Earth is not flat. Details are here:
http://www.orfe.princeton.edu/~rvdb/tex/sunset/ms.pdf.