The speed of light’s the limit, so we hold,
as frequencies get stretched past infrared,
and all the universe is growing cold
a process that apparently has sped
almost impossibly since it began
because expansion should reduce its vim,
and gravity should be custodian
and sweep together, not its antonym.
Thermodynamics on the largest scale
Accelerates decay faster than light;
more locally, this action’s not wholesale,
as galaxies bunch and cluster up tight.
There’s contradiction in what we can see,
so we are forced to re-think gravity.