3 ms·
True. About all we know for sure is what's in very deep mines, or at the bottom of the ocean. AFAIK.
by AlbertCory 3y ago
True. About all we know for sure is what's in very deep mines, or at the bottom of the ocean. AFAIK.
- zabzonk 3y agoalso https://en.wikipedia.org/wiki/Kola_Superdeep_Borehole https://en.wikipedia.org/wiki/Kola_Superdeep_Borehole