Chapter 25 of 29 from Chris Hadfield

Mars: Living on Another Planet


Chris walks through the basic human needs required to live on another planet. Learn what it takes to grow food in space, protect ourselves from the elements, and readjust to gravity.

Topics include: Learn to Grow Food • Prepare for the Repercussions of Weightlessness • Make the Adjustment Easier • Protect Yourself From the Elements • Abide by the Martian • Communication Protocol

Chris walks through the basic human needs required to live on another planet. Learn what it takes to grow food in space, protect ourselves from the elements, and readjust to gravity.

Topics include: Learn to Grow Food • Prepare for the Repercussions of Weightlessness • Make the Adjustment Easier • Protect Yourself From the Elements • Abide by the Martian • Communication Protocol

Chris Hadfield

Chris Hadfield Teaches Space Exploration

In 28+ lessons, the former commander of the International Space Station teaches you the science of space exploration and what the future holds.

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Explore the unknown

Impossible things happen. At age nine, Chris Hadfield knew he wanted to go to space. He eventually went there three times, becoming a commander of the International Space Station. In his MasterClass, Chris teaches you what it takes to explore space and what the future holds for humans in the final frontier. Learn about the science of space travel, life as an astronaut, and how flying in space will forever change the way you think about living on Earth.

Learn about the past, present, and future of space exploration with astronaut Chris Hadfield.

Download the workbook for lesson recaps, assignments, and photocopies of handwritten notes that Chris took to space.

Upload videos to get feedback from the class. Chris will also answer select student questions.


Students give MasterClass an average rating of 4.7 out of 5 stars.

The bast and most profound masterclass of them all. Chris might be the most inspirering human being I have ever come acress. Nothing was handed to this guy. He did everything by him self. Calm, collected, focused and humble. A real man.

This is a great class! I had an amazing time watching each lesson.

Preparation is key, in these types of situations, where you're at the edge of your abilities, at the edge of the technology or knowledge, it is the practice, the work and the focus that get you the end result, not your smarts or your luck.

Simply and absolutely, Chris taught me how to live a more complete life, something entirely unexpected but invaluable.



I'm fascinated with the horticulture part of this. My vision of a farmer in space is a spacesuit with overalls. It's jus a fun thought.

Terra C.

something engineered on Mars, working with the conditions of Mars, maybe after adapting Earth engineered things to get by, or get there in the first place.

Warren D.

Traveling to Mars is so complicated. However, his confidence is admirable. And I am sure we will do it.

Vickie R.

Sorry. Missed some of your lecture because cat was super hungry and she won't back down when it comes to getting her food right on time. However I did receive an e mail from the KOCK brothers (?) saying that it would be pretty impossible to ever visit Mars? I don't know what their who reasoning was because AGAIN I got interrupted by my other cat and I couldn't focus. Should have taken my Ritalin I guess. Hopefully there will be no further interruptions during this next lesson? MEOW.

Junaid M.

Lots of food for thought. Let's practice more on the Moon then go to Mars.

Heather W.

And Star Trek made it look so simple! Guess the Enterprise must have had some way of creating gravity on the ship. :) Fascinating and such complex problems to solve.

Andrew Stephen L.

Martian readaptation chamber...seemingly the easiest way to start construction and to have the real sim of the astronauts coming out of a long space voyage, would be to build one on the surface of the earth that astronauts could go straight into after reentry.Like commercial divers going straight into a recompression chamber, maybe astronauts could go straight into a readaptation chamber and it would then be easier to access what kind of design that facility might take. A weightless water/scuba experience comes to mind as the earliest chamber within the readaptation chamber might be for giving the astronaut some feeling of "normality" . I often thought a water module would be good up on the ISS too..scuba dive in space... actually more for the reason of health, because i think it improves eye function particularly to be immersed in water. Could you get that much water up into space, with a water-lock? if not you might have to try just making it big enough for a persons head. You could have scientists and Doctors living within the quarantined readaptataion chamber and keep the astronauts in there for an extended period.... obviously on Earth it could also be pretty big.... for Mars you would have to refine the instrument. Possibly even for astronauts coming back from the ISS even the cameras and talking to too many people on ground might be overwhelming... the readaptation pod could also be the simulation of astronauts living on Mars .... with the certain plants and oxygen supply etc, and even the Mars Communication Protocol in place...of course you could have other crew members there because the long term goal of The Mars Base is to have crew living there long term. Juggling ideas... my father worked high up in environment planning and transportation, he always said throw as many balls up as you could and see what ones you could catch! x

David P.

This really fills out the story that we hear from folks like Elon Musk. Undoubtedly a very smart man, but Chris really helps with the understanding of just how difficult a task lies ahead.

Gone W.

If I had one question at this point about space flight, going to the moon, etc, it would have been about dealing with radiation. I'm glad he touched on that topic as being a challenge. I would have loved to have stayed with it longer. But he's covering lots of ground and many of these topics are merely seeds for further study and don't have resolutions. Because they're problems still, it shows how this is all continuing to develop.


Growing crops onboard the Space Station would actually solve a couple problems if we could do it. It would give us a sustainable food source and we wouldn't just be digging into our pantry all the time. It would also convert carbon dioxide back into oxygen, just like plants do on Earth. But it's very difficult to count on it. It's complex. It's not a natural place for plants to grow. The complexity of trying to give them an environment where you can 100% count on them growing into the next cycle. What plant should we grow? Should it be like in the movies, potatoes? Or should it be some other plant? Should it be tomatoes? Maybe it should be string beans, something that is the right combination of all the things that we need to stay healthy as human beings. Maybe we're always going to have to have a compromise between some high energy or high protein packaged food, and some of the bulk food that we can grow on board. And it's the thing that we're testing onboard the Space Station. I'm sure when we set up a research station on the moon, where there's a little bit of gravity, about 1/6th Earth gravity, where we can then see how plants grow there and how they can grow in a higher radiation and slightly more hostile environment than on Earth. And through all of that, eventually figure out-- not just a spaceship that will take us to Mars, but a like a little traveling farm that will take us to Mars as well. There's not only going to be engineers and test pilots on that first crew to Mars. You're going to need a farmer onboard, some sort of botanist or horticulturalist just to keep you alive. When I came back from my spaceflights, I did not feel right. My first flight was only a little over a week. I was kind of wobbly, I was OK. It was sort of like I had a really bad cold, or I'd been drinking, or it was like I'd been spinning and now I'd stopped spinning. I was OK, but I obviously wasn't normal. After my second flight, which was a little over two weeks, I felt the same, only slightly worse. But my third flight when I was in space for five months, I felt terrible when I got back. My balance system wasn't still in the process of adapting to spaceflight. It had changed. Because I'd been in weightlessness for so long, my whole way of silently sensing which way was up and my inner ear working with my eyes and working with the weight of my body, trying to tell me where I was, it had changed. To stop me being an earthling and more to try and plasticly adapt me to being a space-ling. I was also nauseous because just everything was so disorienting. And my muscles hadn't been fighting gravity, so it felt weird to move. And my skeleton was a little more fragile because I hadn't been able to exercise it and put loads on it like I had on Earth. Even though I exercised two hours a day, there were still changes physiologically to my body. All of those took time to recover from, but I was back on Earth, and there were a whole team of doctors that...