Astronaut twins make space history as NASA launches landmark experiment

March 27, 2015 4:22 PM

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Astronaut twins make space history as NASA launches landmark experiment

If we are going to fly humans to Mars one day, we’ve got to learn more about how being in space affects astronauts. So Friday, NASA begins a landmark, human experiment.

“That would be me. I think I'm the lab rat,” Mark Kelly told Fox News, during a recent interview in Houston. His twin brother Scott followed, “he's the controlled lab rat. I'm the other lab rat."

Also read: NASA astronaut and former Sen. John Glenn to be buried at Arlington National Cemetery

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