It was due to human causes that they became quite rare now.
The reason this situation occurred was that when the Empire discovered the Thorn Insect Race, a species found everywhere, it happened to be during the Empire's expansion period.
During this period, the Empire often encountered many organisms harmful to humans.
Faced with the almost endless profits brought by expansion and benefits enough to make anyone and any power insanely envious, any organisms hindering human expansion had to die.
Eventually, the Thorn Insect Race was almost exterminated during the Empire's expansion period.
Later, someone noticed that the situation seemed a bit off, so some Thorn Insects were intentionally left for research purposes.
Currently, within the Empire, there should still be individuals being cultivated.
There must also be some outside, maybe lurking on some asteroid.
The spread and harmfulness of the Thorn Insect Race are still evident and now they even have a rare characteristic.
