Helion, the Sam Altman-backed fusion startup, raises $465M to build a power plant for Microsoft
Brynn Putnam's Board raised $20M; plus, ZeroDrift raises $10M to protect AI models from themselves
Pacific Fusion’s latest prototype packs 440 gigawatts into an 80-nanosecond burst; plus, Rocket engine startup Impulse raises $500 million to hire people, not AI
Snap alums unveil Ghost Angels fund; Defense tech darling Mach Industries hits $1.8B valuation

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