An excellent analysis of the real-world engineering challenges. Far too often people conflate sci-fi and over-hyped press releases and assume that pretty much every issue is already solved. I mean, we’ve all seen replicators on Star Trek, right? And no one ever has to use the lavatory in Star Wars.
In real life, sending humans to Mars & back is an astonishingly difficult endeavor — and you haven’t even covered the major health problems posed by multi-year exposure to all the solar radiation we’re conveniently shielded from here on Earth and in low Earth orbit (the ISS).

Anyone who enjoys my articles here on Medium may be interested in my books Why Democracy Failed and The Praying Ape, both available from Amazon.