Meta CEO Mark Zuckerberg holds a smartphone as he makes a keynote speech at the Meta Connect annual event at the company's headquarters in Menlo Park, California, on Sept. 25, 2024. Meta's head of artificial intelligence research announced Tuesday that she will be leaving the company. Joelle Pineau, the company's vice president of AI research, announced her departure in a LinkedIn post, saying her last day at the social media company will be May 30. Her departure comes at a challenging time for Meta. CEO Ma ...