53 botanists, cultivating a tree: G-R-O-W-I-N-G.
It was 55, but then there was a big famine and Dennis had to eat Johnny, and the other botanists kicked Dennis out of the exclusive Botanists’ Society.
You could be forgiven for wondering why botanists, of all people, suffered from a famine. But the story is a simple one, easily summarized by a word: platypi. Perry the Platypus broke through the window and proceeded to break the arms and legs of the botanists. Dennis was the only unharmed botanist, which is why he could eat Johnny.
So now I guess ALL the botanists are dead because Dennis was actually a neurologist in disguise. Dennis wasn’t even his real name; it was actually WILLIAM SORGER (yes, in all capital letters).
Dennis, since all the other botanists were dead, decided to kill everyone else on earth and then escape outside of the galaxy to find those fish-headed aliens. It was pretty easy; he just invented a brain-shaped bomb, exploded Earth and floated away in his neurologist spacesuit. The fish-headed aliens soon found him.
The neurologist was then eaten by the fish-headed aliens, but he didn’t mind, really, because he had always wanted to study the interiors of fish anyways, so he died happily ever after.