Between Two Horizons Simple. Evocative. Accurate.

This perspective situates human knowledge between two genuine limits in contemporary physics: the quantum gravitational regime at the Planck scale and the cosmological horizon imposed by accelerated expansion. These are not metaphysical boundaries, but the current edges of theoretical coherence and observational access.
At small scales, the incompatibility between quantum field theory and general relativity marks a breakdown in our present models. At large scales, cosmic expansion limits the information available to us. Together, these horizons define the bounded domain within which our metrics operate reliably.
The paper does not propose new cosmology. Instead, it clarifies a structural position:
The universe exhibits stable constraint describable through mathematics.
Biology represents a regime shift within those constraints, enabling self-maintaining and recursive organization.
Scientific metrics are biologically instantiated compressions of structural invariants.
Epistemic humility is not optional but structurally necessary due to horizon limits.
We are located between two unknowns. Our models are powerful within this interval, but their success does not guarantee universal reach. The aim is not to dissolve realism, nor to inflate speculation, but to articulate a bounded realism grounded in structure, biology, and constraint.