Decades: 10s 20s 30s 40s 50s - 60s - 70s 80s 90s 100s 110s
Years: 61 62 63 64 65 - 66 - 67 68 69 70 71
... surface of the Earth.
Water comprising hydrosphere is found in various forms :
under the Earth's surface and in rocks
in biosphere - plants and animals
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