Two (unnamed?) Ocean Engineering students created a "hamster-powered submarine" from "materials derived from common household objects" that connected a hamster wheel in a sealed, air-supplied vessel to a propeller, allowing hamsters to take themselves on aquatic jaunts. They documented the build in some detail, and supplied a video of the maiden voyage. One of the design requirements was "the life and well being of the hamster must not be compromised in any way."

HPS Hamstar: the Hamster Powered Submarine

(via DVICE)