Among the alkalimetal row,
the heaviest with stability to show,
It is among those elements out there,
with a three PPM share, considered rare.

A duality within the blue spectral line,
in mineral water of Dürkheim,
Kirchhoff and Bunsen identified,
from caesius the name designed.

Which means sky blue,
which is only in analytics true.
As it shimmers greay metallic,
nothing special, still a certain chic.

Carl Theodor Setterberg the first to see,
the peson who made Caesium pure reality,
which is quite against its nature,
due to its massive reactivity.

High reactivity and high aquaous solubility,
it does not show any natural toxicity,
The radioactive hundret thirty seven isotope,
are best stored and within careful thought,

it is not biologically relevant,
and therefore for life not significant,
if consumed it goes the potassium way,
in muscles and the colon for a while to stay,

In our civiliation Caesium is on a special mission,
the time to relax from exciting is the second definition,
So literally Caesium precises our time,
to organize, plan and to define,

Another quite important application,
is in the raw oil extraction,
as cation in organic acids needed,
in drillilng fluids best output others suceeded.

In common magnetometers Caesium vapour,
to identify magnetic fields for sure,
It is used as ionic drive source in outerspace mobility,
prefered against mercury due to no toxicity,

In catalysis it plays a role in several reactions,
as well as in some fancy generator creations,
Caesium compositions for small amount electricity,
but with a constant long life consistancy,

Casium got time in precise control,
so it defines our life from overall,
allows global communication,
trade and interaction in every ocsion,

Although it is quite special,
it is not toxic overall,
be precise and interact,
within you your superpower to detect.