This was posted by Harry Farkas on alt.humor.puns.

Profesor Miller’s colleague, Professor Gonnen Dunnit of the physics
department, has spent a lifetime pursuing the as-of-yet unreachable goal of
creating cold fusion in the lab. In his latest effort, he used molecules
from vegetables to trigger the process on the atomic level.

During one attempt, it seemed that Professor Dunnit actually achieved his
goal – the process resulted in a spherical burst of energy. The professor
wrote it up and submitted it, but no other scientist could duplicate his
results. The Nobel Prize committee considered his results but dismissed
Professor Dunnit’s efforts, saying he had only created a ball of corn
fusion.