This summer, the first commercial electrical generator to draw power from the ocean tide began supplying Northern Ireland with energy. Installed in an inlet near Belfast, the generator works much like a wind turbine, with massive blades turned by the tide’s current. The angle at which the blades meet the current can be changed: rotating the blade face 180º lets the turbine catch the tide in both directions, while smaller rotations lessen the force exerted on the turbine, preventing damage.
Cost: 30 to 40 cents per kilowatt-hour; a planned installation with seven turbines will lower that cost to about 20 cents per kilowatt-hour
Companies: Marine Current Turbines
A Roomba recorded a woman on the toilet. How did screenshots end up on Facebook?
Robot vacuum companies say your images are safe, but a sprawling global supply chain for data from our devices creates risk.
A startup says it’s begun releasing particles into the atmosphere, in an effort to tweak the climate
Make Sunsets is already attempting to earn revenue for geoengineering, a move likely to provoke widespread criticism.
10 Breakthrough Technologies 2023
These exclusive satellite images show that Saudi Arabia’s sci-fi megacity is well underway
Weirdly, any recent work on The Line doesn’t show up on Google Maps. But we got the images anyway.
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