X-E the Xtinct Xtraterrestrial
was a being serenely celestial.
She lived in the Giant Red Spot
of Jupiter, where quite a lot
of hydrogen storms
are seen as the norm.

X-E was made chiefly of helium
wrapped in a thin epithelium
of  polychloroethane.
But X-E had such a small brain,
that she went into space
without covering her face.

X-E 39
was the last of her kind.
No creature stupider
has lived on Jupiter,
and never will ever again.