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The promise of limitless, carbon-free electricity has for decades inspired researchers to attempt to make fusion energy work. Now one startup plans to deliver it to the grid by the early 2030s. Its design relies on a powerful new magnet that shattered records and should Technology News allow the company to build smaller, inexpensive reactors. This is due to the means transactions are verified, which now requires significant computing energy. Smartwatch and Fitness Tracker See how Apple Watch, Fitbit, Samsung Galaxy Watch, Garmin and a lot of more stack up with our reviews. We publish the newest science news and…