Activity for Son of Thrain‭

Type	On...	Excerpt	Status	Date
Question	—	Can a habitable planet have two separate crusts, both of which can sustain life? Can a habitable planet have two separate crusts, both of which can sustain life? I am wondering if through the planet's creation, over time through some form of mantle cooling/erosion combination, without any intentional artificial construction, a planet can have two crusts, with air in between. Th... (more)	—	over 6 years ago