Joe
Joe asked Andy Weir:

Hi Andy, I listened to your book, wonderfully read by R C Bray, and it reminded me of the Apollo 13 mission. I really liked the fact that all the science / maths was real too. I've been interested in space travel since the moon missions. I'm now 50. Do you think we’ll actually have a manned mission to Mars in my lifetime? And, will the first mission be a one-way journey? Joe Coombe

Andy Weir I wouldn't expect a Mars mission before 2040. 2050's is more likely. I won't speculate on your lifespan. :)
Andy Weir
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