Twin studies are the Holy Grail of medical research, but in some fields its very rare to find qualifying sets of siblings. Two astronaut twins (imagine the odds!) are giving scientists at the Baylor College of Medicine the opportunity to study the genetic aspects of human health outcomes in outer space.
“We have the best ground control you could dream of,” says Graham Scott of the Baylor College of Medicine in Houston, Texas, who is helping NASA with the experiment. The question of space health is especially timely as several human trips to Mars are currently being discussed.
Last year, Scott Kelly was chosen to take part in the first one-year mission aboard the ISS, double the usual stay, along with Russian cosmonaut Mikhail Kornienko. Then last week NASA announced a twist: his brother Mark will be monitored on Earth throughout.
John Charles, chief scientist of NASA’s human research programme, says the brothers came up with the idea: “I was discussing plans with Scott and he said, ‘how about the twins angle?’ ”
Researchers will have access to blood and saliva samples from both twins taken before, during and after Scott’s trip to the ISS, along with assessments of their vision, sleep patterns and cardiovascular activity. NASA will also measure both twins’ bone mass before and after the mission.
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