Current mood:

impressed

Little Hottub on the Prairie
How do you make a hot tub out here on the prairie? Well, take a stock tank, fill it up with water, take a few big ol' aluminum tubs, fill them with a few hundred pounds of quicklime, float the tubs in the stock tank and add some water to them, and then stand back while the exothermic reaction takes place and the aluminum tubs transfer all that nice heat into the water in your stock tank. See PopSci for details and video of Champaign-Urbana's very own Theodore Gray of Wolfram Research cranking up the ol' hot tub in winter, local style.

And that's how we pass the day away in the merry ol' land of Oz.