Bug questions!
as the only viable food source in the house, how long do i have to hibernate in my room before i can wake up to a world without fleas

Fleas themselves can hibernate for three months waiting for another warm blooded mammal to come strolling through. That’s why even abandoned buildings can have huge flea infestations; every little mouse or raccoon to get too close refreshes the population.

Hey Scythe, why do arthropods take so preposterously long to decompose compared to larger corpses?

In a moist environment like soil, they disappear quite fast, but chitin is still a hard material, so it hangs around a little like vertebrate bone.

Almost any corpse will hang around for ages when it’s dry, though. In my terrariums the remains of dead feeder crickets rapidly turn to mush and are eaten up by springtails and such!

You answered a few general asks about insect size and its limitations, but what about insect wings? Is there something to the structure and mode of operation of insect wings that would make them impractical for larger animals (provided they're adequately sized up, of course :P, and the chitin-related problems are taken care of), or air vehicles (I remember one Miyazaki movie where people had insect-wing flying machines) ?

pretty much everything about their structure and mode of operation, really.

At their size, it’s like a feather flapping a couple other feathers to get off the ground, kind of.

If they were scaled up, it’d be like you trying to fly with two giant window panes in your hands.

Is it possible to keep pet millipedes?

Easily! Millipedes are low maintenance and like a tank with a lot of soil, dead leaves and rotten wood. They need a source of water or a humid tank misted every now and then, and they’ll eat most fresh fruits and vegetables.

Hello again Bogleech! I want to know if by this advice is true: After bees attack, they die because they lose their sting. So the best thing you can do when you see a stingless bee in the floor is kill it and end with their suffering. Is this totally true?

Honeybee stings do get torn out in the flesh of larger animals. It’s usually obvious; you’ll see the bee with some innards hanging out, dragging itself around. It’s always good to quickly end something that’s alive and mutilated.

Hey bogs, there's a really awesome ants nest in my backyard and it brings me a lot of joy to watch the little guys go about their business. What kind of things is okay to leave out for them? I used to crumble crackers for them but I doubt it'll keep well for them over winter.

It could, really! They keep very dry conditions underground for storing food, so it’s unlikely to go bad if it’d also last a long time in a cupboard.

You could also try seeds and nuts!

So I often hear that spiders found in one's home will freeze to death if left outside overnight. This makes me wonder: Does this pose a significant problem to spiders who don't occupy homes? If so, how do they combat this, and where did the house spiders go before there were houses?

When arthropods get way too cold, they’ll usually find something like a plant or a tree or a rock to hide inside or under, but they’ll still get cold enough to stop moving until they warm up again. A lot of them can go into a static state and be perfectly fine when the ice passes!

What are those little black dots on mantis eyes? I see them in different positions and it makes it look like the mantis has pupils, but they have compound eyes, right?

They’re referred to as “pseudopupils” and are a trick of the light! They’re basically shadows caused by how light enters and leaves the compound eyes.

your mention of Cockroaches being predators of bedbugs in your cockroach article made me wonder, in a hypothetical situation, would cockroaches be something that could be used to control bedbug populations? Obviously there's a lot of reasons this would not work in the real world (since there's nothing that says they would eat only the bedbugs or that they wouldn't establish their own colonies), but how effective would they be at it if it was some sort of perfect world scenario?

It would probably be harder for bedbugs to establish themselves where there are already a great deal of cockroaches, especially if it’s just a couple adult bedbugs showing up at first. They could all get eaten before they mate and lay eggs.

Bedbugs reproduce fast, though, so it wouldn’t be reliable. Under natural conditions they would probably reach an equilibrium. Of course, take the roaches away and the bedbugs would be that much worse.

The prevailing hypothesis as to why bugs in the carboniferous got so big is that there was more oxygen back then. Are there any competing hypotheses that have evidentiary support?

Lack of insectivorous mammals is considered an equally important factor. It’s likely arthropods could have evolved more efficient respiratory mechanisms over time, but the biggest problem for them was really all the mammals who evolved to be so fast and active all the time. Big arthropods just weren’t flexible or reflexive enough to deal with them, especially when molting.