Man...I'm really liking Stan more and more. Life is very easy when you know how to prepare for as much as possible. So now we have a second person with the ability to see multiple steps ahead consistently like Senku!
Woah, Kurare is on her (presumably her based on the name) game! Having Taiju getting hooked on the smell of the burning ants and all the tid bits about the amazon was great. Plus, the python should just grow and grow without humans to limit their prey so even that looks scientifically accurate too.
But poor Luna. Her passing out at the thought of having to put dead bugs in her skin was hilarious!
I'm glad they found a way to explain away Stan not shooting the group as they went water sliding down the Amazon river. But damn...the chapter ending though! So it is nothing but massive volume of Medusas. The biggest hint appears to be the crystallization that formed at the entrance. That isn't mother nature.
This is more for the mystery thread, but the timeline slightly doesn't match. Why-man shouldn't be able to mass produce all of that only after the experimentation is finished. Senku is already his high school size when the sparrow petrifications stop. Maybe the wavy appearance is due to slightly old Medusa waves combining with newer versions. Plus, based on the comments, the manga team is implying why-man used multiple Medusa attacks from this mass produced Medusas. This really explains the need for 3D printing for all of the parts.
So maybe the crytallization is the speaker why-man used?