Ignoring the stairs in favor of one bounding leap onto the stage, managing director of the Martin Trust Center for MIT Entrepreneurship Bill Aulet told his audience that he’d been warned earlier not to attempt the jump. “But entrepreneurs do the impossible,” he said as introduction to the 2022 delta v Demo Day startup showcase, held at MIT’s Kresge Auditorium in Cambridge, Massachusetts. Taking risks and facing challenges are at the heart of Demo Day, the culmination of the center’s delta v accelerator. The name comes from the scientific term…