What do all of these have in common?

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Across
  1. 1. It's cubesat science
  2. 3. (Plays max verstappen theme)
  3. 5. It's literally rocket science
  4. 7. It's drone science
Down
  1. 2. That's a lot of popsicle sticks
  2. 4. The boat floats!
  3. 6. Carleton's little rover that could
  4. 8. (Iron man frantically taking notes)