First thing I noticed is that I was somewhat confused by the dates. At times I thought it started discussing something occurring in the past before transitioning back to the present tense. By the end of the article I had figured it out, but during the reading I was confused. Just something to note.
Also, in the second you have it starting with Dr. Kolibri and then ending with Dr. Kolibri. I recommend removing the first iteration.
Final note: is the SCP itself subject to the debilitating effects of the radiation, and that is what kills it? Or does it just keep producing radiation that has no effect on itself until it dies of old age?
In all, I like the article, but I think it could use some touch ups.