An anonymous reader quotes a report from Wired: Startup Valar Atomics said on Monday that it achieved criticality — an essential nuclear milestone — with the help of one of the country’s top nuclear laboratories. The El Segundo, California-based startup, which last week announced it had secured a $130 million funding round with backing from Palmer Luckey and Palantir CTO Shyam Sankar, claims that it is the first nuclear startup to create a critical fission reaction. It’s…

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