“...they found that the Martian crust can hold more than twice the amount of water as Earth,...”
Study: Deep beneath the earth, more water than in all the oceans combined
http://www.freerepublic.com/focus/f-news/3300920/posts
Earth may have underground ‘ocean’ three times that on surface
http://www.freerepublic.com/focus/news/3167417/posts
Huge ‘Ocean’ Discovered Inside Earth
http://www.freerepublic.com/focus/chat/1794270/posts
Kola Superdeep Borehole
https://www.atlasobscura.com/places/kola-superdeep-borehole
And what did the Russians find in the deepest borehole besides granite decreasing in density and increasingly more porous? Increasingly more water.
You mean kinda like the “fountains of the deep”?