Comets Come and Go (die for us)

With their long elongated trip to the sun and out to Pluto their trip
can be hazardous to their life Look what happened to the Comet
Shoemaker-Levy How long can they last when for months they come close
to the Sun and its heat causes the comets ice to turn directly into
gas,and this gas pushes our dust that helps make up the porous structure
of the comet,and creates its tail. Its tail has to be the first sign
that it is running out of comet time. Without a tail best we call
it an asteroid(why not?) Now comes a profound thought. "Without
millions of comets in our early solar system I would not be typing in
this spacetime,and you all would not be reading. What help
cool our hot early Earth "comets" What gave us a planet with 75%
water "comets" Impacts from "comets" gave our Earth much of its
carbon,hydrogen,and nitrogen Simple organic materials to condense into
bio-chemicals like "amino acid" Lots more good stuff like RNA which can
reproduce itself without the need for the metal ion catalyst(night bat
explained that to us) Then come the comets greatest gift for producing
life on Earth as we know it. DNA Like what came first the chicken or
the egg? I can ask "what came first the DNA or life?". The answer is
the comet gave us both in one impact(explosion) Best to keep in mind
all this happened over 3 billion years ago. Lets now go
back to 65 million years ago,and ask what gave rise to land mammal?
It was a big comet Comets give up their lives so they could create us
Bert