| 1 | They are typical geological remains from the Glacial Age. | |
| 2 | If it wasn't for snowball Earth we may not be here today. | |
| 3 | What they found is that during the ice ages , the amount of water in the oceans decreased. | |
| 4 | The term "Ice Age" may give a wrong impression. | |
| 5 | We do not know whether we live in a postglacial period or an interglacial period. |
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