In Elon Musk's telling of the story, his friendship with Google co-founder Larry Page soured in June 2015, at the Tesla and SpaceX CEO's 44th birthday party. There, Page reportedly called Musk a "speciesist" for saying he favored humans over future digital life forms. That happened while they were discussing the terrifying potential of artificial intelligence. With Musk's 55th birthday just weeks away, and SpaceX having just completed the largest IPO in history , he and Page are the two