What's the quickest thing in the world?

Related questions

1. Which Eagle is the strongest?
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3. What bird can fly the longest?
4. Is there a bird that never lands?
5. What are large birds called?
6. What makes a bird a bird?
7. Which birds never land?
8. How long bird can fly without stopping?
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Tags

1. #light
2. #undoubtedly
3. #speed
4. #universe
5. #earth
6. #leaving
7. #fastest
8. #velocity
9. #recorded
10. #reached
11. #before
12. #pluto
13. #expected
14. #spacecraft
15. #according
16. #thing
17. #horizons
18. #launched