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Making Babies In Space May Not Be Easy
Hugh Pickens writes "Studies of reproduction in space have previously been carried out with sea urchins, fish, amphibians and birds, but Brandon Keim writes in Wired that Japanese biologists have discovered that although mammalian fertilization may take place normally in space, as mouse embryos develop in microgravity their cells have trouble dividing and maturing. The researchers artificially fertilized mouse eggs with sperm that had been stored inside a three-dimensional clinostat, a machine that mimics weightlessness by rotating objects in such a way that the effects of gravity are spread in every direction. Some embryos were ultimately implanted in female mice and survived to a healthy birth, but at lower numbers than a regular-gravity control group. Part of the difference could be the result of performing tricky procedures on sensitive cells, but the researchers suspect they also reflect the effect of a low-gravity environment on cellular processes that evolved for Earth-specific physics. '"These results suggest for the first time that fertilization can occur normally under G environment in a mammal, but normal preimplantation embryo development might require 1G," concludes the report. "Sustaining life beyond Earth either on space stations or on other planets will require a clear understanding of how the space environment affects key phases of mammalian reproduction."'"
Folks at NASA have been running experiments in space for decades....where can I find results of all those experiments? Or was it money down the drain?
If I put an egg into a blender, I'm pretty sure it'd have a hard time forming a chicken too.
"There is no reason to expect that their clinostat successfully captures the essence of the problem"
I looked at the image of that clinostat. The researchers are probably pretty smart people, but there is just no way that a centrifuge on steroids can duplicate zero-G. The embryos have to be subjected for changing gravitational forces. Said forces may cumulatively add up to zero, in theory, but those embryos aren't experiencing theory.
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It's like people are so amazed by how awesome zero-g is that they can't accept that working against it might be the best option.
That's probably what influences the designers of spacecraft.. the awesomeness of zero-g...
Either that or because systems involving artificial gravity are too costly to justify themselves, and the "brain dead" solutions are actually smart solutions which save money/make missions possible.
Perhaps a spaceflight engineer would respond "problem: no gravity in orbit, we're not used to this. brain dead solution: create artificial gravity! price/practicality is no object if it means we have no new problems to solve!"
Maybe at some point there will be a zero-g problem which really is easier to solve with centrifuges than with anything else, and you can bet when that point comes centrifuges will be chosen.
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No matter, the Japanese space program proposed a module that would allow the study of incremental gravity on mammals, everything from low gravity to three times earth gravity, or the astronauts could sleep in it. That was scrubbed.
Why (not) on Earth would you want to simulate >1g in space? Anything below 1g, sure, but for greater you could just use a centrifuge on Earth where it doesn't take 1000kg of propellant to get every kilogram of payload to your test apparatus.
Rampant carbon sequestration destroyed the Dinosaurs' tropical paradise. I'm here to help repair the damage.
It'll be tough to build a 1G chamber on the Moon.
It'll be a damn sight easier than building a 0.16G chamber on Earth. Unless you have a source of Cavorite that you're not telling us about?
Rampant carbon sequestration destroyed the Dinosaurs' tropical paradise. I'm here to help repair the damage.
Or rather Larry Niven invented a plot device to create the Belter culture... And of the hundreds of plot devices that he invented, one happened to be somewhat correct.
This is no more a simulation of no gravity its simply telling you that mice don't do well in rolling barrel.
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After about a year in space you cannot walk when you land on earth.
This isn't necessarily a problem. Sure, if you want to walk around Earth then you're going to be in a bit of a fix... But what if you plan on spending the rest of your days in space? What if it's a one-way trip?
If we are going to live in space we are going to have to figure out how to create gravity on whatever structure we decide to inhabit.
I thought we'd already figured this bit out? All you have to do is spin the structure.
I really doubt we would mutate fast enough to take advantage of weightlessness to survive.
We don't need to.
When's the last time you saw somebody sitting out in a snowstorm waiting to mutate and grow an insulating fur coat? Around here we just but on a coat. We're human beings, we have brains, we can make and use tools.
That's the whole point of experiments like this one. We're not going to wait around for environmental forces to craft us into better organisms... We're going to identify the problems and fix them, just like we have for thousands of years. That's what we do.
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People around here bash scientist a lot, when they are really reading the media. I had a teacher once who had a favorite saying that it seemed like he said at least once a class... "All models are wrong, but some are useful". The same can be said about simulations. After an experiment is performed, in which something is simulated, conclusions are supposed to be drawn. Then, further experiments are supposed to prove or disprove these conclusions. Are you suggesting that they should not have tried this experiment first (which is probably 1/10 of the cost of doing it in space)? They will probably use this experiment as justification for a grant to actually try it in space.
Science is constrained by fiscal realities. And the honest fact is that even if we do have the experiment done completely in space, it is still being done on mice. We won't know how it affects humans until we send a girl up there to get knocked up and see what happens.