Hours before his company, SpaceX, was set to launch a rocket to the International Space Station, Elon Musk gave thousands of eager fans the chance to pick his brain in a Reddit "Ask Me Anything" interview.
(Today's SpaceX flight was scrubbed due to rocket trouble. Musk said they'll try again Friday at 5 a.m. ET.)
During the interview, no topic was off limits, as Musk addressed everything from his favorite food and drink to his plan to send humans to Mars.
Here's what we learned:
Food and Drink
When inviting the billionaire futurist to a party, be sure to offer him whiskey, his drink of choice. The South African-born Musk also likes French food and BBQ.
Musk has already warned that machines with artificial intelligence may one day be more dangerous than nuclear weapons, however he doesn't believe we're set for a robot war just yet.
"The timeframe is not immediate, but we should be concerned," he wrote. "There needs to be a lot more work on AI safety."
Mission to Mars
Expect to learn more toward the end of 2015 about SpaceX's Mars transport system and plans for a spacesuit to be worn by astronauts traveling to Mars.
"The Mars transport system will be a completely new architecture. Am hoping to present that towards the end of this year," Musk wrote.
As for the spacesuit, "We are putting a lot of effort into design esthetics, not just utility. It needs to both look like a 21st century spacesuit and work well. Really difficult to achieve both," he said.
His Most Important Daily Habit
When asked what daily habit had the largest positive impact on his life, Musk had a one-word answer: "Showering."