Harnessing the sun’s power has been a goal of humankind since ancient times. Cliff dwellers used overhangs to keep out the hot summer sun while allowing the winter sun’s rays to reach inside and heat the rocky floor and walls. The Romans covered south-facing windows with mica or glass to keep in the warmth generated [...]

Affordable solar energy use for the masses may seem as far-fetched as walking on the moon once did. But as energy costs continue to rise, and governments and citizens demand alternative energy options, the technology has slowly but surely evolved. Perhaps solar power isn’t as affordable as we’d like, but in fact, it has never [...]