But Tuesdays Q&A session was more special because Facebook boss got the question from Facebook's more high profile users, including Stephen Hawking, Arnold Schwarzenegger and Arianna Huffington.
Stephen Hawking asked about “Unified theory and the other forces” and about Mark’s interest.
Schwarzenegger asked about, how does he find time to squeeze working out into his busy schedule?
Huffington, on the other hand wanted to know how storytelling format would evolve in the future.
Zuckerberg also answered several questions from non-famous Facebook users, including one long answer on the future of Facebook.
The CEO said he would be hosting another Q&A session soon. We waiting ...