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>> GRUNSFELD: The Hubble is our premier observatory orbiting the
Earth, unraveling the mysteries of the universe. We did five
missions to upgrade and service the telescope. Hello I'm John
Grunsfeld, NASA astronaut, you might wonder, 'How did we learn
to do the complex tasks using all the cool tools that we used
on the Hubble Space Telescope?'
One of the things that makes humans unique,
and certainly one of the things that makes it a
lot of fun to work on spacewalks is developing tools. There are
other animals that use tools, but nobody in the animal kingdom
ever came up with anything like this!
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