That paper shows the value of visualization... I followed the Bellman Forest Problem link to the Wikipedia page on the Moser's Worm Problem[1] and it didn't do anything for me.

In Ward's paper, he summarized Moser's Worm Problem differently (p.7):

In 1966, Moser posed a related problem which roughly asks: “What's the best-shaped hammer for smashing one-inch worms?”

Great visualization!

[1] https://en.wikipedia.org/wiki/Moser%27s_worm_problem

thanks for the link!