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With catalysts created by an MIT chemist, sunlight can turn water into hydrogen. If the process can scale up, it could make solar power a dominant source of energy.
A device for power tools may also help regenerative braking.
Lab experiments suggest that future fusion reactors could use helium-3 gathered from the moon.
The device uses thermoacoustics for greater efficiency.
A technology developed by IBM to cool computer chips could be a boon for solar energy.
An “adaptive” engine promises to make ethanol more competitive.
A startup hopes to commercialize a novel design that features fluid electrodes.
A material that selectively blocks heat and light could finally make it practical to add smart windows to buildings.
Novel materials could make practical air conditioners and refrigerators that use little or no electricity.