Perelandra exists says Harvard

http://ultraculture.org/blog/2014/06/13/may-ancient-earth-inside-earth-say-harvard-scientists/

Sorta.

native life, no
but on the cooling orb
strange cities grew
daubed by visitors
programmed pleasure palaces
Theia did not approve
her kisses smoldered
debris, now, 100s of kilometers down
still sinking slowly
Hadean cities, ships, gods
Theia's corpse still hot
face-off across the core