Zach Weinersmith

They also lose what's called the baro reflex, which is that thing where you go from lying down to standing up and you get a little dizzy. That can happen in space so that when you get back to Earth... It's considered very impressive if you can merely walk after a few months. More subtle effects are things like higher rates of certain bacterial infections that we don't experience on Earth.

They also lose what's called the baro reflex, which is that thing where you go from lying down to standing up and you get a little dizzy. That can happen in space so that when you get back to Earth... It's considered very impressive if you can merely walk after a few months. More subtle effects are things like higher rates of certain bacterial infections that we don't experience on Earth.

They also lose what's called the baro reflex, which is that thing where you go from lying down to standing up and you get a little dizzy. That can happen in space so that when you get back to Earth... It's considered very impressive if you can merely walk after a few months. More subtle effects are things like higher rates of certain bacterial infections that we don't experience on Earth.

Might be due to stress, might be due to the zero gravity allowing bacteria to just kind of float around. And then somewhat especially worryingly is that you reliably experience vision loss, and we don't know why. And this happens even on short trips. The best version of this is that we lose some vision and you have to send up what are called space adjustment goggles or glasses rather.

Might be due to stress, might be due to the zero gravity allowing bacteria to just kind of float around. And then somewhat especially worryingly is that you reliably experience vision loss, and we don't know why. And this happens even on short trips. The best version of this is that we lose some vision and you have to send up what are called space adjustment goggles or glasses rather.

Might be due to stress, might be due to the zero gravity allowing bacteria to just kind of float around. And then somewhat especially worryingly is that you reliably experience vision loss, and we don't know why. And this happens even on short trips. The best version of this is that we lose some vision and you have to send up what are called space adjustment goggles or glasses rather.

The scary version is that there's some broader nerve damage that we don't understand yet that could cause cognitive effects if people were up in space longer.

The scary version is that there's some broader nerve damage that we don't understand yet that could cause cognitive effects if people were up in space longer.

The scary version is that there's some broader nerve damage that we don't understand yet that could cause cognitive effects if people were up in space longer.

That's exactly right. Yeah. And that's important. So there's some world in which 40% Mars gravity makes things just fine. Like one of the things we worry about is having babies in space and zero gravity. You try to imagine like kids not developing bones normally, maybe 40% gravity is enough to make the body work out.

That's exactly right. Yeah. And that's important. So there's some world in which 40% Mars gravity makes things just fine. Like one of the things we worry about is having babies in space and zero gravity. You try to imagine like kids not developing bones normally, maybe 40% gravity is enough to make the body work out.

That's exactly right. Yeah. And that's important. So there's some world in which 40% Mars gravity makes things just fine. Like one of the things we worry about is having babies in space and zero gravity. You try to imagine like kids not developing bones normally, maybe 40% gravity is enough to make the body work out.

Or maybe there's even some world in which you wear like a weighted suit and that's enough to handle it. But we don't know is the problem.

Or maybe there's even some world in which you wear like a weighted suit and that's enough to handle it. But we don't know is the problem.

Or maybe there's even some world in which you wear like a weighted suit and that's enough to handle it. But we don't know is the problem.

Yeah. Often when this question comes up, if it comes up at all, it's like, can you have a baby in space? And the answer might well be yes. A bigger, trickier part is, can they develop to an age where they can have babies? Can they go through all the stages of development in this foreign environment? Gestation, birth, becoming teenagers, all this stuff.

Yeah. Often when this question comes up, if it comes up at all, it's like, can you have a baby in space? And the answer might well be yes. A bigger, trickier part is, can they develop to an age where they can have babies? Can they go through all the stages of development in this foreign environment? Gestation, birth, becoming teenagers, all this stuff.

Yeah. Often when this question comes up, if it comes up at all, it's like, can you have a baby in space? And the answer might well be yes. A bigger, trickier part is, can they develop to an age where they can have babies? Can they go through all the stages of development in this foreign environment? Gestation, birth, becoming teenagers, all this stuff.

You know, Kelly mentioned the perchlorates on the surface, they disrupt hormones. Yeah. Right? And there's a bunch of subtle stuff that we haven't got into. Like, if you go to the ISS... The atmosphere is very high in carbon dioxide, orders of magnitude more than on Earth. We can tolerate it, but astronauts often complain of headaches.

You know, Kelly mentioned the perchlorates on the surface, they disrupt hormones. Yeah. Right? And there's a bunch of subtle stuff that we haven't got into. Like, if you go to the ISS... The atmosphere is very high in carbon dioxide, orders of magnitude more than on Earth. We can tolerate it, but astronauts often complain of headaches.