Non Gradus Anus Rodentum

The science of life and Proliferation,
The science of nature and everything within,
The science that bestows upon us, senile creature the ability to admire the manifold intricacies of creation and life itself!
I am a student of this particular Science.

The day before was my final examination of Zoology.

And the scenario played out thus;
Here I was, cramming my head, absorbing all that I could about these ever so complicated animals and their anatomies; when I came to a part where I had to study in detail about the Rat!
The Black-Rat also known as the Asian black-rat is lovingly called by us Biology students as "Rattus rattus". What a cute name for such a loathsome creature, I told myself.

The study went on for hours. I was made to analyze everything from the brain to the pericardium of the sneaky little rodent.
After about 6 hours of continuous study about the critter, I let out a loud Sigh of relief;
I had finally succeeded in mastering the intricate anatomy of the Rat, and was quite proud of it too! A gush of excitement crept in as I imagined outdoing myself (and everyone else) in the exam after having displayed my enormous knowledge over the Rat’s physiology; I saw myself topping the class, and I smirked at the thought of my classmates wearing a look of utter bewilderment at what I had managed to accomplish!
(But alas!)
I was brought back to reality as my phone rang...
“trrrring trrring” went the phone; enraged at it for playing spoilsport,
I quickly snapped back to reality!
It was one of my college friends; excited at the prospect of my having a chance to brag about my new achievement, I coolly asked him, "So dude, are you done with the Morphology of The Rat?", A few moments of silence ensued and then came a retort which sounded more or less like an- "aenh!!!!???”;, yes, it was a crisp, sharp and very much disturbing -"aenh!!!???"
I was quite taken aback by the unexpected manner of reply.
I had this sudden feeling of guilt; had I hurt his feelings with my bragging? Had I spoken something out of turn? The questions played on inside my head, and so did the "aenh!!!!???'s", resounding deep within.
Finally mustering enough courage, I asked my friend-"What happened? Did I say something out of place, did I say something wrong?", "No dude, Not at all; only I feel a little sorry for you!” came the reply.
And the reason for his sudden overflow of empathy struck me like a killer blow to my solar plexus. “Our syllabus”, he said, with a slight hint of sadism in his voice “does not include the Order: Rodentia”!

After this revelation that I had had over the phone, I was quite the upset person!
Such hard work, all gone to waste!
The Rat; I swore to myself- Will have to pay!

Several hours of brooding later I told myself that it was indeed- futile to mourn about my recent unfortunate happening!

"Non Gradus Anus Rodentum” I told myself!
It just isn't worth a Rats ass!