""Modern science says no such thing.""
Below ground water :-
https://economictimes.indiatimes.com/news/science/scientists-found-a-massive-underground-ocean-hidden-700km-below-earths-surface-heres-all-about-it/articleshow/113849982.cms?from=mdr
https://ssec.si.edu/stemvisions-blog/there-ocean-below-your-feet
https://www.quora.com/Is-there-a-reservoir-of-water-3-times-the-volume-of-all-the-oceans-located-deep-beneath-the-Earths-surface
