Cheaper Solar Power
New solar arrays from SolFocus generate more power than conventional solar panels but use just one-thousandth as much expensive semiconductor material. The arrays’ curved mirrors focus sunlight onto one-square-centimeter solar cells, concentrating the light 500 times and improving the cells’ efficiency. SolFocus’s first power-producing installation will be generating 500 kilowatts of electricity by the end of the summer. The company expects that by 2010, electricity from its arrays will be about as cheap as electricity from conventional sources.
Product: SF-1000S-CPV-30 6.2-kilowatt 30-panel array
Cost: 24 to 28 cents per kilowatt-hour of electricity; SolFocus expects that figure to fall to 13 to 14 cents per kilowatt-hour by 2010
Geoffrey Hinton tells us why he’s now scared of the tech he helped build
“I have suddenly switched my views on whether these things are going to be more intelligent than us.”
ChatGPT is going to change education, not destroy it
The narrative around cheating students doesn’t tell the whole story. Meet the teachers who think generative AI could actually make learning better.
Meet the people who use Notion to plan their whole lives
The workplace tool’s appeal extends far beyond organizing work projects. Many users find it’s just as useful for managing their free time.
Learning to code isn’t enough
Historically, learn-to-code efforts have provided opportunities for the few, but new efforts are aiming to be inclusive.
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