Who invented Yin Yang?

Related questions

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2. What is yin deficiency?
3. What's a qi deficiency?
4. What is the story of yin and yang?
5. Can a swollen spleen heal on its own?
6. What are the main beliefs of Confucianism?
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8. What religion does yin yang come from?
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Tags

1. #found
2. #remains
3. #inscriptions
4. #least
5. #skeletal
6. #animals
7. #bones
8. #ancient
9. #terms
10. #chinese
11. #early
12. #century
13. #various
14. #divination
15. #characters
16. #earliest
17. #oracle
18. #origins
19. #practices