>>82773953
Essentially you'd be breeding extremophiles in the lab. Multiple cultures would be the go to in order to inch worm to an ever increasing salinity. One culture gets a bump, if it goes extinct then you simply go back to the prior salinity and inoculate it with one of its cousin cultures. As for why it's magnesium chloride, that's the least toxic/temporary of the salts that I found from this pdf: https://onlinelibrary.wiley.com/doi/pdf/10.1002/9780470376454.app1
It gets well below the 0.6 aw threshold too and it's cheap. Bromide salts are iffy and microbes(life generally) doesn't like them too much. Caesium fluoride is the coolest out of the bunch for a super dense solution, but it would also be toxic. The hydroxides will turn into carbonates over time and the acetate is something that microbes would like to eat.

Also amoebas can be really neat :). Are you saying you wouldn't want to poke a pelomyxa? They apparently feel like touching snot though, so not anything impressive. Also is that a mold culture? I mean I can see what definitely looks like mold growing on the surface, but the stuff under it looks kind of more like worms, but that surely can't be the case. Also you'd probably love this channel: https://www.youtube.com/@journeytomicro
Sadly it seems they won't be making any new videos in the future though.
>>82774372
Gotta love mustelids :)
>>82777792
Lookin' forward to the (You) and I can't believe everyone figured out it was me.