Tesla CEO Elon Musk has long captured attention with his big promises, from the Hyperloop high-speed transportation system Musk claimed would revolutionize the way we travel to a recent comment about how Tesla owners can one day make money with their autonomously driven cars,

Bill Gates accused Elon Musk of killing poor children as he announced Thursday that he would donate his remaining fortune to his charity, the Gates Foundation.

The two men have long had a rivalry, and this isn't the first time the Microsoft cofounder has criticized Musk.

Bill Gates says $200 billion spent over the next 20 years will go toward causes to help save and improve lives around the world. He also criticized the Trump administration's cuts to aid, saying they could lead to more child deaths.

Bill Gates announced he will give away “virtually all” his wealth through the Gates Foundation in the next 20 years. The Microsoft founder plans to distribute around $200 billion through his foundation,