Gap Fill - Astronauts' DNA - Level 1


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   astronauts      blood      chances      DNA      extreme      factors      mutations      radiation      research      space  

Paragraph 1

Scientists found that our can change in space. This change could increase astronauts' of getting cancer. The scientists did on the blood of who flew on the Space Shuttle 20 years ago. They gave ten days before going into and three days after coming back. Professor David Goukassian said astronauts work in an " environment" where and other could "result in ".

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