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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, a dexterous humanoid astronaut helper, known as Robonaut, is on display for participants of the STS-133 Tweetup. Robonaut 2 (R2) will be delivered to the International Space Station on space shuttle Discovery's STS-133 mission. Although R2 will initially only participate in operational tests, upgrades could eventually allow the robot to realize its true purpose -- helping spacewalking astronauts with tasks outside the orbiting laboratory. NASA is hosting about 150 of its Twitter followers from around the world and se…
