CAPE CANAVERAL, Fla., Oct. 13 (UPI) -- For NASA astronaut Peggy Whitson, it's the callouses on the tops of her feet -- from using foot restraints -- rather than on the bottoms that made her realize how unusual it is to live without gravity. During a news conference Sunday, Spacewalker Piers Sellers recalled a moment when he was out at the end of a 45-foot long truss and watched the sunrise from beneath his feet.
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