jm + zero-gravity   2

7% of Scott Kelly's Genes Changed After a Year in Space - Universe Today
The study took into account possible genomic and cognitive changes between the two [twin] brothers. These findings were recently clarified by NASA, which indicated that 93% of Scott Kelly’s genes returned to normal after he returned to Earth while the remaining 7% points were missing. These were attributed to “longer-term changes in genes related to his immune system, DNA repair, bone formation networks, hypoxia, and hypercapnia.”

In other words, in addition to the well-documented effects of microgravity – such as muscle atrophy, bone density loss and loss of eyesight – Scott Kelly also experienced health effect caused by a deficiency in the amount of oxygen that was able to make it to his tissues, an excess of CO2 in his tissues, and long-term effects in how his body is able to maintain and repair itself.
nasa  space  iss  spaceflight  scott-kelly  zero-gravity  future  microgravity  health  via:elliot 
5 weeks ago by jm
The mysterious syndrome impairing astronauts’ sight - The Washington Post
Visual impairment intracranial pressure syndrome (VIIP) is named for the leading theory to explain it. On Earth, gravity pulls bodily fluids down toward the feet. That doesn’t happen in space, and it is thought that extra fluid in the skull increases pressure on the brain and the back of the eye.
viip  sight  eyes  space  zero-gravity  health 
july 2016 by jm

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