| Description: | Scientist say a radar map of the Martian north pole reveals a four-layer ice structure laid down over a period of five million years, on top of sedimentary rocks hundreds of kilometres thick. |
| Rating: | |
| Author: | kathforhistory |
| Published: | May 18, 2008 |
| Version: | 1.4.7 |
| Categories: | Express Widgets |
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