Primeval moon seen from snowball Earth, illustration. At least twice during its history the Earth was completely covered in ice from pole to pole. The most extensive occurrence of 'snowball Earth' occurred between 600 and 700 million years ago. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / RON MILLER |
Taille de l’image : | 3600 px × 2980 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |