I am a third year graduate student in physics at the University of California, Santa Cruz (UCSC). I study very high energy gamma-ray astrophysics. I'm interested in understanding the physical processes creating gamma rays in blazars, and using blazars as probes of the extragalactic background light. Before coming UCSC, I did my undergraduate work at the University of Minnesota. In my spare time, I like traveling, sewing, being outside and thinking of ways to communicate science to the general public. If you wish to contact me, please email me at caajohns @ My office is in Natural Sciences II, room 318.