Why do Klingons look so different?

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Tags

1. #heads
2. #their
3. #predators
4. #heightened
5. #designer
6. #chain
7. #senses
8. #neville
9. #features
10. #because
11. #klingons
12. #according
13. #extra
14. #would
15. #sensory
16. #ridges
17. #backs
18. #receptors