<p>Behind the fall of David Sabatini, 'one of the greatest scientists' of his generation.</p><p>In 2018, David Sabatini was a world-renowned molecular biologist. He was a tenured professor at MIT. He ran a major lab at the Whitehead Institute, overseeing a team of 39 researchers, postdocs and technicians. Their job was to disentangle the mystery of the mTOR signaling pathway, a protein Sabatini had discovered while still in medical school, at Johns Hopkins. The mTOR signaling pathway plays a critical role in tumor development. Figuring out how it works would go a long way toward saving countless lives.</p>