Earth is the third planet from the Sun and the only place known in the universe where life has originated and found habitability. While Earth may not contain the largest volumes of water in the Solar System, only Earth sustains liquid surface water, extending over 70.8% of the Earth with its ocean, making Earth an ocean world.

More details here: <https://en.wikipedia.org/wiki/Earth>

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It sounded to me like the inside of a volcano (not that I know first hand how it sounds), but there is a description how it was made: https://freesound.org/people/samsmyname/sounds/51363/