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imagine what it would be like if you

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left the earth for an entire year

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away from your friends your family

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everything you love and care about

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two of earth's bravest are making that

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sacrifice right now

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they've traveled beyond our atmosphere

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for a year-long stay aboard the

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international space station

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here they'll study the effects of

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prolonged weightlessness on the human

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body

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their discoveries will allow humans to

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travel farther into space than ever

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before

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the conditions are harsh

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the risk is great

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but the potential payoff

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is huge

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we could stay on earth but that's not

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who we are

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we're scientists and we're explorers

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we'll always venture into the unknown

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and seek to expand our knowledge

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one day soon

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humans will step foot on mars

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and it's the science being conducted

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today aboard the international space

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station

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that will help us get there

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we explore the universe because we must

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because humankind's future doesn't