Although solar energy is often seen as a technology tied either to spacecraft or terra firma, a new generation of engineers and adventurers is crafting solar-powered aircraft.
Solar lanterns are already making some headway in India's poorest areas, and a new study suggests they could be a bigger part of the effort to reduce fossil fuel use while improving lives.
Analysis: Massive solar projects are sexy but bring a raft of land-use, technical and distribution headaches with them. Perhaps tapping America's roofs could provide some cover.
Solar is a great theoretical answer to climate concerns and energy independence. Although some nettlesome questions keep it from becoming a practical solution, skyrocketing oil makes some answers more palatable.
The cheapest solar technology is just situating your home or office in the right direction when it's built. You don't have to be Socrates to understand the concept — but it might help.