What The Heck Is This?!Can you identify these weird items that caused strangers to ask for help on the Internet? Each list has many different strange items which were all eventually identified...but try to do it yourself without looking at the answers!
Looks like an ovarian tumor - it's definitely not yolk. It may have detached naturally and been encapsulated in the egg as part of the “production line” processes of egg formation.
I found something similar in one of my ducks, but she just excreted it like a poop rather than it being caught up inside an egg. I found it on the pathway and did as you did, cut it open for a look. She was fine, but I'm sort of still guessing to this day as to absolute specifics of the foreign object.
It can only be two things: Mold, which if it is, then it needs to go because of health reasons. It also could be expanding insulating foam. Either way, it it would be easier to see what it is if it's taken off. If the source of it is coming from a crack in the window sill, it's probably the foam. However, the foam doesn't melt like that unless gas or another chemical is put on it.
[If] you have something gross in the shower, you don't keep it there until you know what it is. You get it out of there and worry about it later.
Concluding that this was, in fact, an old oral rubber band for my braces 12+ years ago. Must’ve been in my wallet from 7th grade. I seriously thought it was some kind of bacterial growth from the coin at first.
According to this article, it is abundant in southern Uruguay, which matches the area OP lives. The article also mentions "Its sting is feared because of the intense pain experienced by the victims."