Answer to Dictation 1
They have discovered that our DNA can change when going into space.
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Answer to Dictation 2
DNA mutations could increase the risk of space travellers getting cancer.
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Answer to Dictation 3
Astronauts provided blood samples ten days before they went into space.
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Answer to Dictation 4
Work in an extreme environment where many factors can result in mutations.
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Answer to Dictation 5
Space radiation means there is a risk that mutations could develop.
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Answer to Dictation 6
Goukassian said his study could be important for the future of space travel.
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Answer to Dictation 7
Several nations are working on sending astronauts to Mars.
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Answer to Dictation 8
A race by commercial companies to start the business of space tourism.
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Answer to Dictation 9
More research was needed to study the harmful effects of space travel.
Go to Dictation 10
Answer to Dictation 10
The last time humans went to the moon was during the Apollo 17 mission.
See the astronauts' DNA lesson for the whole text.
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