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OpenAI researcher Jason Wei is joining Meta’s new superintelligence lab, according to multiple sources familiar with the matter. Wei worked on OpenAI’s o3 and deep research models, according to his personal website. He joined OpenAI in 2023 after a stint at Google, where he worked on chain-of-thought research, which involves training an AI model to…

Before 2008, there was no requirement for pacifiers—or any children’s products—to be tested for safety, according to Nancy Cowles, product safety advocate and former executive director of the nonprofit Kids in Danger. “I think that consumers can trust that pacifiers sold at major retailers have been tested,” Cowles says. “It might be harder to tell…