Earth: Day Zero • Paper 122 of 512

Entrance–Exit Symmetry Observations

One of the recurring questions within the Earth: Day Zero framework concerns the apparent relationship between candidate entrance-domain and exit-domain structures.

This paper inventories symmetry observations without assigning causal interpretation.

Candidate Symmetries

• high-versus-low elevation relationships;
• continental-versus-oceanic expression;
• gravity relationships;
• geometric placement;
• great-circle reconstruction compatibility.

Constraint Perspective

The existence of symmetry does not establish mechanism.

It establishes an observation requiring evaluation.