How many ice ages have we had?

Related questions

1. Will there ever be another ice age?
2. What caused the last ice age to end?
3. How did the Ice Age animals die?
4. Why did the last ice age end?
5. How warm was the Medieval Warm Period?
6. Will there be another ice age?
7. Is the earth still in an ice age?
8. How much of the Earth was covered in the last ice age?
9. Is the ice age still ending?
10. How thick was the ice in the last Ice Age?

Tags

1. #alternating
2. #warming
3. #periods
4. #secondly
5. #major
6. #interglacial
7. #quaternary
8. #experienced
9. #averaging
10. #called
11. #middle
12. #earth
13. #years
14. #characterized
15. #currently
16. #glaciation