| 3 The first photograph ever taken of an "Earthrise," on | Note that the ice shields of Antarctica and Greenland are counted as land, even though much of the rock which supports them lies below sea level |
|---|---|
| University of British Columbia, Okanagan | Based on data from the and datasets, extreme values for coverage of lakes and streams are 0 |
Washington, DC: American Geophysical Union.
| Clarke's Table of Crust Oxides Compound Formula Composition SiO 2 59 | The Life and Death of Planet Earth: How the New Science of Astrobiology Charts the Ultimate Fate of Our World |
|---|---|
| Due to natural fluctuations, ambiguities surrounding , and mapping conventions for , exact values for land and ocean coverage are not meaningful | Naval Observatory and Bureau International des Poids et Mesures |