Helion raises $425M to help build a fusion reactor for Microsoft

Few fusion startups have been as closely watched as Helion. The 12-year-old company is backed by Sam Altman, rumored to be in talks with OpenAI, and has a deal to supply Microsoft with electricity by 2028 — years earlier than its competitors.  The company’s unorthodox approach to fusion power and relative secrecy has earned it […]

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