[ WP ] The reason why Earth has so many varieties of diseases , parasites and bacteria is because countless alien civilizations use Earth as a testing ground for weapons and vaccines , and they did n't expect anything to live here . We find out eventually and get very angry .

The human in front of me was pissed. Her clenched fists were wringing the edges of her blue uniform and her face was turning an unbecoming shade of purple. I assumed she was trying not to hit me. To be fair I could n't blame her, but then again, scientific advance does require sacrifice. 
 
 `` So. Every blight, every sickness? Was you.'' Emissary Collins stared at the ground in disbelief. 
 
 `` Well, not ME specifically. But yes.'' Her hands reached out for two of my six eyes as if to gouge them but she restrained herself. 
 
 `` Billions of us over time. Trillions even. The bubonic plague, influenza, cancer....all of it.'' She was shaking, her dark red hair falling into her face and hiding her eyes. Rage vibrated off of her body. 
 
 `` Well to be fair we also supplied the planet with the cures as we were developing the diseases. It really is n't our fault you did n't discover them all in a timely manner.'' I took a step back when she met my eyes. Unbridled hatred burned into me, and I felt what the humans would refer to as guilt. 
 
 `` How long have you known about us?'' It was barely a question, her voice was quiet and shaking. 
 
 I winced visibly. `` About four hundred of your years.'' Blue eyes widened in shock, tears forming in the corners. 
 
 `` Why?'' 
 
 `` I mean, well. It was n't just my decision.'' I was stumbling over myself, and the human took another step back. Internally I resisted the urge to slide backwards. 
 
 `` ***WHY? ***'' Collins hissed between her teeth. 
 
 `` Well I mean, humans are VERY durable, and surprisingly compatible with many species across the known universe......'' 
 
 `` **WHAT** does that ***MEAN? *** `` Her voice was fire and she moved even closer to me. 
 
 `` Y-You were the ideal control to perform our tests on.'' Another step. `` Perfect lab rats as you call them.'' I offered an attempt at a human comparison, to help her understand how instrumental the humans had been to the scientific growth of my species. Emissary Collins had gone still, her eyes boring into a pair of my own. 
 
 The silence was deafening and I shifted my back feet uncomfortably. 
 
 I did n't even realize she was on me until I felt the knife penetrate my cranial shell. 
 
 
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 Thank you for reading! Any feedback is greatly appreciated!
