We already see that lower gravity can cause astronauts to lose calcium in their bones from a short period of time.
How's that? The lower gravity I mean.
I don't make this stuff up. NASA makes this stuff up.
https://www.nasa.gov/audience/foreducators/postsecondary/features/F_Bones_in_Space.html
So what you meant was 'we have been told that lower gravity can cause astronauts to lose calcium in their bones from a short period of time'. Fair enough.
I was confused by 'we already see'.
We ... as in mankind
already ... as in it has happened
see ... as in observe or have scientifically documented.
I don't know how you could have interpreted that any differently?
We already see that lower gravity can cause astronauts to lose calcium in their bones from a short period of time.
How's that? The lower gravity I mean.
I don't make this stuff up. NASA makes this stuff up.
https://www.nasa.gov/audience/foreducators/postsecondary/features/F_Bones_in_Space.html
And all that data is based on people living in MICRO-GRAVITY. So virtually 0g. That is NOT the same as someone living in a third of earth's gravity about which there is virtually no data. And, again, for the hard of thinking, if you live in a lower gravity environment you don't need your bones to be as strong. It's only if you returned to earth that you'd be in trouble.
Sorry, I'll go back to explaining as though you are 10 years old.
Zero gravity means none.
We'll take earths gravity to be 100%
Therefore we can say Mars gravity is 38% of earth's gravity.
SourceSo, if in 3 months your bones start losing all their calcium in zero gravity, at 38% they are going to lose a huge amount of it. Especially over a life time.
Now that means it won't be as extreme as zero gravity ... but there will be a notable difference. And that will effect you whther you are on earth or Mars because your bones will not grow to regular length and grow straight because you removed a lot of the material that is necessary for normal bone growth.
Imagine if you will, a deep sea fish. When we bring them to the surface, they die. It isn't that there is no pressure up at the surface ... it isn't zero pressure ... but it isn't the same as 4 miles deep either.
People have not evolved to live on Mars. Now, you could genetically engineer them to do so ... but by the time you changed their bones, respiratory system, CNS, etc ... they would be so different to a human that they would be another species ... one I will go ahead and call Martians. And they won't be able to breed with us. They won't be able to live with us. They will see us as an alien species and likely declare independence for Mars just as America did to the British ... and like the Americans will say it doesn't matter you are more powerful right now ... you are too far away so bring the war to us and see how you get on. And we'd lose. And now we have a hostile race of intelligent aliens living on the very next planet and all because you want more science.