Bill Casselman is an amazing mathematician with a diversity of interests. As this makes clear, he's been embracing computation and computational mathematics "s

Bill Casselman is an amazing mathematician with a diversity of interests. As this makes clear, he's been embracing computation and computational mathematics "since before it was cool." He also has an interest in mathematical history, and travelled to India to see the oldest-known occurrence of 0 (https://www.ams.org/publicoutreach/feature-column/fcarc-india-zero https://www.ams.org/publicoutreach/feature-column/fcarc-indi...). I'm sure he has tons of other interests about which I don't know.