The Download: AI agents' autonomy, and sodium-based batteries

Next slide, please: A brief history of the corporate presentation PowerPoint is everywhere. It's used in religious sermons; by schoolchildren preparing book reports; at funerals and weddings. In 2010, Microsoft announced that PowerPoint was installed on more than a billion computers worldwide. But before PowerPoint, 35-millimeter film slides were king. They were the only medium for the kinds of high-impact presentations given by CEOs and top brass at annual meetings for stockholders, employees, and salespeople.