Turritopsis dohrnii: A species of jellyfish that can revert back
To a sexually immature state when its injured or dying, making it biologically immortal.

A jellyfish,
Nothing but thickened water
Some genetic material
Polythene bags and paper glue,
Is granted immortality.
We, humans
The heirs of a billion evolutions,
A million grains of life,
Crumble like sand castles
Scatter like sawdust.

The universe taunts,
Laugh until your shadow swallows you
Your every breath was a thousand last breaths,
Puny mortal.