This project dates back to 2009, but it’s entirely new to me: the HPS Hamstar is a hamster-powered submarine constructed out of a 3-liter bottle, a hamster wheel, and a few other household materials (with a total cost of $57). Its maiden voyage—documented above—was powered by Houdina, now in retirement after a single trip in the submersible. According to the creator of the HPS Hamstar, “the major difference between steam power and hamster power is that you don’t have to shovel hamsters into a furnace.” All joking aside, one of the objectives of the project was that “the life and well being of the hamster must not be compromised in any way.” [via Neatorama]