Professor Popper's Problem was created in 1974.
The duration of Professor Popper's Problem is 1.52 hours.
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Professor Unrat was created in 1905.
The Professor's House was created in 1925.
Professor Challenger was created in 1912.
Professor Potter was created in 1957.
Professor X was created in 1963.
The Professor's Commencement was created in 1902.
Professor Ivo was created in 1960.
Professor Chronotis was created in 1980.
Professor Power was created in 1982.