In the event the proton does not decay as described above, in a timescale of approximately 10 65 years, apparently rigid objects such as rocks will be able to rearrange their atoms and molecules via quantum tunnelling, behaving as a liquid does, but more slowly.
In the event the proton does not decay as described above, the degenerate era will last longer, and will overlap the black hole era. In a timescale of approximately 10 65 years, apparently rigid objects such as rocks will be able to rearrange their atoms and molecules via quantum tunnelling, behaving as a liquid does, but more slowly.