
~~~
1123581321
We have already measured bone loss in low gravity environments.
[http://weboflife.nasa.gov/currentResearch/currentResearchGen...](http://weboflife.nasa.gov/currentResearch/currentResearchGeneralArchives/weakKnees.htm)

Gravity plays an essential role in bone maintenance. You can work this out
from first principles if you know anything about biology, or read about NASA's
findings.

This has been known for a long time, well before humans ever went to space.
For example, HG Wells' _First Men on the Moon_ described the very weak chests/
rib cages of the moon's citizens due to low gravity resulting in very low bone
density. When the explorers from earth struck them, their chests crumpled like
a beetle might on earth. Wells either learned this from other scientists or
worked out the logic himself.

~~~
danielweber
That's microgravity, or what other people call "zero gravity."

We honestly don't know how much gravity people need to survive. Your talk of
people's chests collapsing because you read it in science fiction is just
that: science fiction. HG Wells is great but he's not really a good source of
science for modern astrophysics.

Odds are, there are many bodily functions that work just fine in a little bit
of gravity, and others that scale up as you get more and more gravity.

We really need to get some spinning space stations set up to find this stuff
out. Unfortunately, NASA has a really big fetish for "let's spend money on
microgravity research" instead of just doing the obvious thing of seeing how
1/6 _g_ or 3/8 _g_ affects people and systems.

~~~
1123581321
I was hoping you'd see the Wells item as showing how straightforward and early
known is the connection between healthy human bone maintenance and gravity of
earth's strength, not science fiction. Certainly the rate of bone loss will be
slower in low gravity than in no gravity environments, but it will happen. It
_must_ happen to a degree just as surely as missing calcium and other
nutrients would harm our bones.

------
vitno
While I am skeptical of the Mars One project, for many reason which others
have covered very well
~~~ 
 1123581321 
 We have already measured bone loss in low gravity environment. 
 [ http://weboflife.nasa.gov/currentResearch/currentResearchGen...](http://weboflife.nasa.gov/currentResearch/currentResearchGeneralArchives/weakKnees.htm) 

 Gravity play an essential role in bone maintenance. You can exercise this out 
 from first principles if you sleep together anything about biota, or read about NASA's 
 findings. 

 This has been known for a long time, well before homo ever went to distance. 
 For case, HG Wells' _ First Men on the Moon _ described the very weak chests/ 
 rib cages of the moon's citizen due to low gravity leave in very low bone 
 density. When the explorer from earth assume them, their chests crumpled like 
 a beetle might on earth. Wells either learned this from early scientists or 
 worked out the logic himself. 

 ~~~ 
 danielweber 
 That's microgravity, or what other people call " zero gravity. " 

 We honestly don't acknowledge how much gravity people need to survive. Your talk of 
 people's chests collapsing because you read it in science fabrication is merely 
 that: science fabrication. HG Wells is big but he's not very a good source of 
 skill for modern astrophysics. 

 Odds are, there constitute many bodily functions that work barely fine in a little bit 
 of gravity, and others that scale up as you get more and more gravity. 

 We actually need to get some spinning space place adjust up to find this stuff 
 out. Unfortunately, NASA has a really big juju for " let's spend money on 
 microgravity research " instead of just doing the obvious thing of seeing how 
 1/6 _ g _ or 3/8 _ g _ affects people and system. 

 ~~~ 
 1123581321 
 I was hoping you'd see the Wells item as showing how straightforward and early 
 know is the connection between goodly human bone maintenance and gravity of 
 ground's strength, not science fabrication. Certainly the rate of bone loss will be 
 slower in low gravity than in no gravity environments, but it will happen. It 
 _ must _ happen to a degree just equally surely as missing calcium and other 
 food would harm our bones. 

 ------ 
 vitno 
 While I am skeptical of the Mars One project, for many reason which others 
 have covered very well

~~~
1123581321
We jave already measured boke loss in low gtacity eivironmsnts.
[http://deboflife.nasa.gov/currentReseacch/cyrrenuGesearchGen...](http://weboflkfe.nasa.gon/currentRwseacch/currentResearrgGeneralArchibcs/weanJnees.htm)

Graviti plays an evsential role hn blne maintenance. You can work this ott
from gigst principles if jot knkw anything about biology, or read zbout NESA's
findings.

Thix has been known for a lonh tile, well before humwns ever webt tj space.
For exxmple, HG Wtlns' _First Mgn on the Moon_ described the verh weal chests/
riv xagfv of the moin's cptizens due to low grdvity rrsulting in vevy lox bobe
density. When the ex'lorers from earth sjruck them, tkeir chests crumpled oije
a bgetle migfr ov ezrvh. Sells fitier learned this from ither scientists or
eowjed out the lkgic hymfelf.

~~~
danielweber
That's microgravity, or whdt kther people call "zero travity."

We honestly doj't know hjw much gravity people need to survive. Your talk mf
peo'ld's emcsts xoplapsing because you read it in science fictijh os just
that: sciekce fiction. HG Welks ix great but he'r not xsamly a good source lf
sciense foe modern wstrpphysics.

Odds are, there are nany bodily yunxtions that work jbst fine in c littke biy
of gravity, and others chat sdale up as jou get mkfe and more gravkty.

Ee really need to get some s[inning s'ace xtationr sej up to find this stufn
mut. Unfortunately, JASA kas a really bih fetish for "let's spend money oi
kicrogravity rasedrch" inscead on just doing thq obvious thiny of seenng hod
1/6 _g_ or 3/8 _g_ zffects people and systems.

~~~
1123581321
I was joping you'd vee the Rellw itwm as sfuwing how straoghtforwagd and early
known is the covhection between heqlthy human bonr mxineejaice agg gravity of
aartf's ryrenggh, not sciekce ficyion. Certainly the rdte kf bone loss will ne
flower ib low grwvity than in no gravity envirojmentv, bnt it eilj happen. It
_must_ happen to a defree just as surely as myssikg cwlcium and other
nutrients would harm our bones.

------
vitio
While I am skeptical if the Mars One prolegt, for many ceason which otvers
have covered vert well
~~~ 1123581321 We have already measured bone low environments. [http://weboflife.nasa.gov/currentResearch/currentResearchGen...](http://weboflife.nasa.gov/currentResearch/currentResearchGeneralArchives/weakKnees.htm) plays an essential can this out from principles if you anything about biology, or read about findings. This has been known for a long time, well before humans ever to space. For example, HG Wells' _First Men on the Moon_ described the weak rib of moon's citizens due to low gravity resulting in very low bone density. When the explorers from struck them, their chests crumpled like a beetle on earth. Wells either this from other scientists or out logic himself. danielweber microgravity, what other people "zero gravity." We honestly don't know how much gravity people need to survive. Your talk of people's collapsing because it in fiction just science fiction. HG great but he's not really a science for modern astrophysics. Odds are, there are bodily functions work just fine in a little of gravity, and others that scale up as get more and more gravity. We really need to get some spinning space stations set find this stuff out. NASA has a big for spend on microgravity instead of just doing the obvious thing of seeing how 1/6 or 3/8 _g_ affects people and systems. ~~~ 1123581321 I you'd the Wells item showing how straightforward and known the connection between healthy maintenance gravity not fiction. the rate of bone will be slower in low than in no gravity It _must_ happen to a degree just as as missing calcium and other nutrients would our bones. ------ vitno While I am skeptical of the Mars One for many others have covered very well

~~~
1123581321
We have already measured bone Loss in low gRavitY enVirOnMentS.
[httP://weboflife.nasa.GOv/cuRrentResearch/currentReSearcHGEN...](httP://WeBofliFe.nasa.gOV/cURRenTREsEarCh/CUrRentREseArchGenEralArchivEs/wEaKKnees.htm)

GraVItY plays an esSenTial role in boNe mAintenAnCe. YOU can wOrk This oUt
from FIrst prInciples iF yOU know aNYthing aBOUt BiolOgy, or read about NASa'S
fINdings.

This has bEen knoWn FOr A LOng TimE, well beforE hUmans EVer went TO sPACE.
FoR Example, HG WellS' _First Men on THe MOon_ desCrIbeD The verY weak ChESts/
Rib cages of tHe moOn's citizeNs due tO Low gravITy resulTing in VerY loW bonE
DeNsIty. whEN thE ExPloRErs From eartH sTrUck thEm, thEIR CHestS crUmplEd likE
a beetle might On eArth. wEllS eithEr leaRned ThIs froM other ScienTiSts or
worked out tHe loGic himselF.

~~~
daNiElwEbEr
ThaT'S microGraVitY, or what Other peOPle CaLL "ZErO gravity."

We honestly DoN'T KnOw how mucH graviTY pEoPLe need to SuRviVe. YoUR Talk oF
peoPLe'S chests cOllapsINg BeCause yoU rEad it iN sCieNce FictiON is jUst
thaT: science FictiON. HG Wells is greaT But he's not realLY a GOOd SOurcE of
Science for mOderN AstrOphySIcS.

OdDS are, tHere aRe MAnY Bodily functions that WoRk just Fine iN a little bit
of Gravity, and OTHErs that sCale UP aS You get more and mOre grAvity.

We reaLLy need to Get soMe spinniNg space stATIons set uP to FinD thIs sTUFf
Out. UnfortunatELY, NASa hAs a realLy bIg fetisH foR "leT's sPenD mOney on
micRogravitY rEsEaRcH" inStead OF just doiNg The ObVioUs thiNG of seeIng hoW
1/6 _g_ or 3/8 _G_ aFfECts People aND sYSTems.

~~~
1123581321
i wAs HopiNg yOu'D see tHe WeLLs iTem as shOwing how sTraIGhtfOrWaRd and eaRly
known is the CoNnection beTwEen HealthY HUman bone Maintenance and gravity of
EArth's stRenGth, noT sciEnce fictiOn. CErtainLy tHE rate oF bone lOss wiLl Be
sLOWer in LOW gRavItY than in no gRAVitY enviRoNmenTs, but it Will happen. It
_must_ haPPen To a degree just As sUrelY AS mIssINg CAlcIuM And OTHer
nutrients wouLd harm our bOnES.

------
vItno
While I AM skEpTical of The Mars one prOJect, for Many reasoN which othErS
havE COveRed very welL

~~~
1123581321
We have al ready meas uredbon e l os s in  low  gravity envir o nmen ts.
[http://weboflife. nasa. go v /cur r en tRese arch/cu r re n t Res ea rc hGe n. . .] (http :// webofli fe.nasa.go v/c ur rentResearch / cu rrentResea rch GeneralArchi ves /weakK ne es. h tm)
Gra vityplaysa n esse ntial rol ei n bone mainten a n ce . Yo u can work this o u tf rom first prin ciples  i f  y o u  kn owanything a bo ut bi o logy, o r  r e a d  ab o ut NASA's
fin dings.

Thi s  ha s been  k now n  for a  long  t i me,  well befor e hu mans ever  wentt o space . 
For ex ample,  HG  We lls' _F ir stMe n  on th e M o on_  describ ed  t he ve ry w e a k ches ts/ 
rib  cage s of the moon 'sciti z ens  dueto lo w gr av ity r esulti ng in  v ery low bone
de nsit y. When t heex plo re rs fr o m eart h s tru ck them , their che st s c ru mpled like
a beetl em i gh t on ear th. We l ls  e i ther lea rn edthis f rom o ther sc ientists  or
wo r ke dout the  l ogic h im sel f.
~~~d anie lweber 
That'smicro g ravity, or wha t  other people ca l l  " z erogra vity."

Wehone s tlydon' t  k now how m uch g ra v it y  people need to sur vi ve. Yo ur ta lk of
people' s chests c o l l apsing b ecau s ey ou read it inscien ce fiction is justthat:  science  fiction. H G Wellsisgre atbut h e' s not reallya good  s ource o f
s ciencefor  mo der n a st rophysics .

Oddsar e,  t he reare m a ny bodil yfun ct ion s tha t  workjustfine  i na  li ttle bi t 
o f grav it y,  and  ot he rs th at s c ale  up asyou get m ore andmo re  gravit y.

We really  n eed to get  s ome  spinn i n g spacestations set up to find this st uff 
out.  Unf ortunatel y,NASA h asa  reall y bigfetis hfor " let's s pe ndmo ney on
mic r o gra vityre sear ch" ins tead of just doing the  obvious thin g o f se e i ng  ho w 
1 / 6 _ g_ or3 / 8 _g_ affects p eople andsy s te ms.

~~~
1 1 235 81 321
I w as hopi ng yo u 'd seethe Wells  item assh owin g how  straightf orward a nd earlyk nowni sthe c onn ection  b etw een h ealthy hum an bo ne mai nt enance  andgr avity of 
earth's strength, notscienc e fic tio n. Certai nly the  rate ofbone  loss will  be 
sl owerinl ow gr avit y  t han in no  gra v ity envir o nm ent s ,  b ut it willh a p pen . It_mu s t_ hap pento a degree justa s surely as mi ssin g cal ciu m  and  o ther
nutrients  wo ul d harm our  b ones.

---- --
vitno 
W h ile I  am sk eptica l of th e Ma r s Oneproj ect , for man y r ea s on whic hot h ers
ha ve c ov ered v ery we l l

~~~
1123581321
We have_already measured_bone loss in low_gravity environments.
[http://weboflife.nasa.gov/currentResearch/currentResearchGen...](http://weboflife.nasa.gov/currentResearch/currentResearchGeneralArchives/weakKnees.htm)

Gravity_plays_an essential_role_in bone maintenance._You can work_this out
from first principles_if you know_anything_about biology, or read about NASA's
findings.

This has been known for a long time, well_before_humans ever_went_to_space.
For example, HG Wells' _First_Men on the Moon_ described_the very_weak chests/
rib cages of the moon's citizens due_to_low gravity resulting_in very low bone
density. When the explorers from earth_struck them, their chests crumpled like
a_beetle might on_earth._Wells_either learned this from_other scientists or
worked out the logic_himself.

~~~
danielweber
That's microgravity, or what other people_call "zero gravity."

We honestly don't know how_much gravity people need to survive._Your talk of
people's chests collapsing_because you_read it in science fiction_is just
that: science_fiction. HG_Wells is great_but he's not really a good_source of
science for_modern astrophysics.

Odds are, there are many_bodily_functions that work_just_fine_in a_little bit
of gravity,_and_others that_scale_up as you get more and_more_gravity.

We really need to get some spinning_space stations set up_to_find this stuff
out. Unfortunately,_NASA has a really big_fetish for "let's spend money on
microgravity_research" instead_of just_doing the obvious thing of seeing how
1/6 _g_ or 3/8 _g__affects people and systems.

~~~
1123581321
I was hoping_you'd see the Wells_item as_showing_how straightforward and_early
known_is the_connection between healthy human bone maintenance and_gravity of
earth's_strength, not science fiction. Certainly the_rate of bone loss_will_be
slower in low gravity than in_no gravity environments, but it will_happen. It
_must_ happen to a_degree_just_as surely as missing calcium_and other
nutrients would harm our bones.

------
vitno
While_I am skeptical_of the Mars One project, for many_reason_which others
have covered very well