Space Invaders

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Across
  1. 1. Poronkusema is the distance a ______ can travel before they urinate.
  2. 6. Which type of space zone is reserved for close friends and loved ones
  3. 7. Which nationality of people were said to have no individual property in the past?
  4. 8. What is something that a meter is precisely measured from(using krypton)
Down
  1. 2. What is the name of the people who got their walking freedom in England.
  2. 3. Airplanes scared what animal in Causby's yard
  3. 4. In which country are many cities being abandoned due to people moving into cites(1.1m in 10 years)?
  4. 5. In where are people not allowed to claim property or own anything(public property)