MacroGlide on Instagram: "One of the more surreal moments in Harvard’s tech history was Mark Zuckerberg appearing as a guest in a CS50 lecture early on, when Facebook was still tiny and the room had barely 20 students. There was no hype, no packed auditorium, and no sense that one of the most influential tech founders of the century was speaking—just a small group of students listening to a peer talk about building something experimental. In hindsight, the scene captures how world-changing compa