Scientific Discoveries CS

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Across
  1. 1. a large body of ice
  2. 4. an action that people expect to see the future
  3. 5. when all the members of a species are dead
  4. 7. a tool for examining and exploring
  5. 8. change from solid to liquid
Down
  1. 2. a person who lived in former times
  2. 3. humans, apes and monkeys
  3. 6. a path around a space object