We're supposed to have sun for the rest of the week, but it's never good to take chances with the weather. So, when the sun came out today, we hit the ground running with three solar thermal projects at once. This time, instead of working with complicated, photovoltaic, solar panels, we experimented with harnessing the heat of the sun to expand air, purify water, and turn a pinwheel. Each project was simple to put together, and provided easily observable results, but with lots of little...
