"NASA's Human Research Program (HRP) has released solicited research response area NRA NNJ13ZSA002N-TWINS "Differential Effects on Homozygous Twin Astronauts Associated with Differences in Exposure to Spaceflight Factors" that solicits applied research in support of HRP goals and objectives. This response area is Appendix D of the Human Exploration Research Opportunities (HERO) NRA (NNJ13ZSA002N)."
"There is a singular opportunity to propose limited, short-term investigations examining the differences in genetic, proteomic, metabolomics, and related functions in twin male monozygous astronauts associated with differential exposure to spaceflight conditions. This opportunity has emerged from NASA's decision to fly veteran NASA astronaut Scott Kelly aboard the International Space Station (ISS) for a period of one year commencing in March 2015, while his identical twin brother, retired NASA astronaut Mark Kelly, remains on Earth. Scott Kelly, a veteran of two Space Shuttle flights as well as a six-month ISS mission, will have a cumulative duration of 540 days in low Earth orbit at the conclusion of the one-year flight, while Mark Kelly, a veteran of four Space Shuttle flights, has a cumulative duration of 54 days in low Earth orbit. This opportunity originated at the initiative of the twin astronauts themselves."
Keith's note: I have to say this is a cool idea. Hats off to the Kelly brothers for making this offer.