  For nearly 100 years, the paradox of Schr\"odinger's Cat has remained
unresolved. Why does the world we live in appear classical despite being
composed of quantum particles governed by the Schr\"odinger wave equation?
Lajos Di\'osi and Roger Penrose propose the wavefunction collapses because it
describes two incompatible space-times, demonstrating an inconsistency between
quantum mechanics and general relativity. To avoid this paradox, collapse must
occur within Heisenberg's time-energy uncertainty limit. Subatomic particles
with low mass, and correspondingly low energy, collapse in years, while
superposed cats would collapse almost instantaneously. We propose a table-top
experiment to put two small mirrors into superposition and observe them
collapse in a time consistent with the Di\'osi-Penrose model. We employ two
techniques to perform this experiment in ambient laboratory conditions. Most
experiments separate a small mass by a large distance. In contrast, we displace
a large mass by a small distance where the self-energy follows an inverse
square law with correspondingly high collapse times. We further use a
symmetrical apparatus, where a break in symmetry indicates collapse independent
of decoherence.
