Why has no country claimed Antarctica?

Related questions

1. Is there any unclaimed land left?
2. What happens if a baby is born in Antarctica?
3. Why do we not fly over Antarctica?
4. Is there a flag for Antarctica?
5. Is Antarctica ever dark?
6. Is going to Antarctica illegal?
7. Why do planes do not fly over the Pacific?
8. Do fish live in Antarctica?
9. Is it dark in Antarctica for 6 months?
10. What type of climate is Irkutsk Siberia?

Tags

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3. #treaty
4. #continent
5. #states
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10. #could
11. #research
12. #superpower
13. #claim
14. #other
15. #antarctica
16. #claims
17. #which
18. #signed
19. #territorial
20. #result