• RE1 - Unit 4A (Reading Comp)
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  • Para A - What do some astronomers believe?
    That intelligent life EXISTS elsewhere in the universe.
  • Para A - What do they think will happen soon?
    We will soon CONTACT these beings.
  • Para B - Some scientists believe that 12 billion years is too long a period of time for what?
    For only one planet to have life in the WHOLE universe.
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