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A new process that simultaneously combines the light and heat of solar radiation to generate electricity could offer more than double the efficiency of existing solar cell technology, say the engineers who discovered it and proved that it works. The process, called 'photon enhanced thermionic emission," or PETE, could reduce the costs of solar energy production enough for it to compete with oil as an energy source.

Fundamentally, without major government commitments to high-speed rail, America simply will not have a high-speed passenger rail network. This should probably be discomfiting, since every other economic superpower (the EU, Japan and China) does have a high-speed rail network. That makes America look a bit backward. The time horizon for building such a network is several decades, and it's interesting to think about what will happen in the middle decades of this century if air transport becomes unaffordable due to high fuel costs and America doesn't have an electric alternative for high-speed intercity transit.

Daniel Nocera talks about his bio-emulative ground breaking innovation to store electricity as plants do.

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