THE INVENTIONS THAT CHANGED/ARE CHANGING/WILL CHANGE THE WORLD

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Across
  1. 3. What is becoming important in transportation today?
  2. 5. Which invention could replace humans in the future?
  3. 6. Which invention could we not imagine life without today?
  4. 8. Which invention changed how people observe celestial bodies?
  5. 9. What kind of tourism will be popular in the future?
Down
  1. 1. What tracks heart rate, steps, and sleep patterns?
  2. 2. Who discovered penicillin?
  3. 4. What did Rudolf Diesel discover?
  4. 7. What helped people find their way?