@LaBlue0314 Yes, my sim has mastered science, and the cloning she can do has been very handy. She's mastered inventing too, and the pink diamond for the simbot was very hard to come by as well, but not as hard as those fireflies. I was having her drill with the miner to find one, as that's the only way I'd ever found one in the past, but having no luck this time. Then she created a meteor shower with the group science project, and got her pink diamond that way. You can be sure she cloned it immediately. I'm saving samples of everything she may need again later, even the more common items, to save her having to go looking for them again.
It's been quite a while since she mastered alchemy, but I have never seen that opportunity yet. Hopefully, she will get it before too much longer. My plan for her is to master every skill, so she has a lot of different skills already, and gets opportunities related to many different skills. I turn down a lot of them, so as not to waste her time repeating things she's finished with.
When you say it will be a rare event, do you mean the rare insects showing up around the hospital? I could check out the area around there every night, just in case they show up.