When did humans first appear on Earth?

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Tags

1. #after
2. #years
3. #million
4. #event
5. #cretaceous
6. #fossil
7. #three
8. #extinction
9. #including
10. #first
11. #paleogene
12. #earth
13. #appeared
14. #animal
15. #record
16. #plant
17. #around
18. #quarters
19. #eliminated
20. #species
21. #dinosaurs
22. #about