The way to make sense of what is under the earth or where the universe ends, is from a philosophical idealistic perspective, in contrast to the main stream materialistic view. The world being a plane of existence and a consciousness phenomenon. A discussion equally relevant either the earth is flat or a ball. It is still and an illlussion, - a dream within non-dual consciousness. The world is not real. It exists - but it is not real as being permanent, not changing and have no beginning or end, as existence or consciousness.
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