Were there horses in North America before the Spanish?

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Tags

1. #american
2. #spread
3. #north
4. #conquest
5. #america
6. #plains
7. #known
8. #subsequently
9. #after
10. #spanish
11. #great
12. #caballus
13. #alien
14. #introduced
15. #horses
16. #domesticated
17. #beginning
18. #throughout
19. #escaped