Solar concentrator

Solar Cows

A friend of ours stops in from time to time unannounced, often with a technical question on his mind. Before the weather turned so cold, he asked if we had any ideas for keeping his pond open for the winter. We had nothing intriguing to offer; just a...

Turn On the Heat

When I was eight years old or so, my mom took us to the local lake. It was a particularly hot day and I put on sunscreen. After hours of fun in the lake, we came in for a picnic lunch. I was crispy. The swim suit straps had saved only a narrow stripe...