Astronaut twins to serve as research subjects

Nasa’s only identical twin astronauts are planning to serve as guinea pigs for studies investigating the genetic impacts of long-duration space flight.

Astronaut Mark Kelly, who commanded four space shuttle missions including the final flight of Endeavour, is set to be a test subject on Earth while his twin undergoes studies in orbit. Kelly left Nasa in 2011 to care for his wife, former US representative Gabrielle Giffords. She was shot through the head in January 2011 when a gunman opened fire at a political event in Arizona, killing six people and wounding 26 others.
His brother, Scott Kelly, is preparing for a year-long mission aboard the International Space Station, the longest single space flight Nasa has ever attempted.
Four Russian cosmonauts lived for a year or longer aboard the now-defunct Mir space station.
“This is sort of our first foray into the genetic aspects of space flight,” said John Charles, chief scientist with Nasa’s human research programme at the Johnson Space Centre in Houston.
“A study like this is going to be mostly observational, just see what we can find out,” he said.
Nasa is soliciting ideas from researchers about possible experiments. Mark Kelly, who lives in Arizona with his wife, has volunteered to go to Houston several times during his brother’s year-long space flight for tests, Charles said. Scott Kelly is a veteran of two shuttle missions and previously served as a space station crew member and commander. Scientists will be looking for genetic differences in the twins due to one brother living in the gravity-free environment of space and the other on earth.

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