My adviser had two labs. One was in photon migration, where I was for my PhD research. The other was using fluorescence dynamics to look at processes in living cells …. People came from all over the world to learn fluorescence techniques from him, and I thought it would be stupid not to learn from him while I was there. He moved to the University of California, Irvine, and I moved with him to do a postdoc. I immersed myself in a different type of imaging.