| 000 | 00494nam a2200097Ia 4500 | ||
|---|---|---|---|
| 008 | 170517s9999 xx 000 0 und d | ||
| 245 | _aSnowball Earth | ||
| 300 | _aOver 650 million years ago, our entire planet existed in a frozen state. So speculates the hypothesis known as Snowball Earth. The mounting evidence of this controversial phenomenon is explored in great depth in the second episode of Catastrophe... | ||
| 650 | _xScience. | ||
| 856 | _uhttp://topdocumentaryfilms.com/snowball-earth/ | ||
| 999 |
_c334372 _d334372 |
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