I've done my first test of buying a whole pallet of filament straight from a Chinese manufacturer. It's a risk - it could be all junk - but if it's usable, the price advantage is insane. Like $3/kg for PETG at the factory gate (like $5/kg after sea freight and our 24% VAT). Versus local stores which sell for like $30/kg.

I'd love to see someone try to 3d print with a filament that melts at 162K. Where do you even buy xenon filament? ;)

Yeah, if you had injected moulded PLA, it would have been just as terrible

Early on, I was overdoing chamber heating, and later discovered that was part of my problem. A blanket and a duvet can get a P1S's chamber over 70C. But if you do that, in my experience, like half an hour or so into the print you'll get heat creep problems and the filament will split & the extruder will just dance around in the air as though it were clogged (though maybe my filament was just garbage... it certainly was *wound* terribly). I ended up using a meat thermometer stuck in through one of the holes to measure temperatures, and then I'dadjust the positioning of one small blanket over the chamber to try to keep it in the mid to upper 50s, and was able to finish big prints that way.

But yeah, whatever means you use, you need some sort of raft and very strong reinforcements.

Remember that models used from a decade or more ago always make simplifying assumptions, and that those tend to be unquestioned until data shows that they must be. Even now climate models can't handle all the variables known to be needed. Turbulence is *extremely* difficult to handle. And there probably is some "butterfly effect". The way that's normally handled it to run an ensemble of models with slightly different conditions, but they may all make some of the same simplifying assumptions.

Well, panspermia is possible, but not extremely likely. OTOH, if life started on Mars, it could well have spread to Earth on impact debris. The further away, the less likely. But remember that yeast have survived in space conditions for months, perhaps years...and that wasn't in extreme cold (though it was in inactive form).

OTOH, years is different from centuries. And for interstellar trips in a comet, centuries wouldn't be enough.

Those are descendants of LUCA. A better question would be viruses, because in that case we don't really know. (There aren't any ribosomes. [OTOH, if there are descendants of another origin, they've massively adapted.])

OTOH, we haven't checked all life on earth. So assertions about universals should be viewed with that in mind.

No. The mapping of nucleotide sequences onto amino acids isn't predetermined. We've built in the labs versions that are different.

OTOH, the argument still isn't good. It could be a low, but not extremely low, probability. In that case the first one to show up could have a VERY strong advantage. And we haven't checked all life on Earth, so the assertion that they are all the same hasn't really been proven, either.

We are pretty certain that the appearance of life involved some very low probability events, but that there were a lot of environments around with lots of different samples for a long period of time, so a "low probability event" should be expected to show up (even if not any particular low probability event).

As was mentioned earlier, this isn't talking about a turbine blade, it's talking about an air intake. Also, "millimeter level"? This isn't the early 2000s. I usually print with a layer thickness of 100 microns, and the printer's control of the Z axis is well finer than that.

The problem is that they made an insane choice of a material for the intake. It was supposed to be ABS-CF, but instead it was apparently PLA. Corn plastic. The stuff people make Warhammer figures and the like out of.

I mean, the fact that PLA's chain is vulnerable to scission by water is in a way nice - not just from a compostability perspective, but from a health perspective too. I don't mind sanding PLA, for example, because PLA microplastics aren't going to build up in your body the way that, say, PETG or ABS might. At 60C, PLA microparticles decompose fully in just 10h. It's significantly slower at lower temperatures, but still, they don't persist. Also, a lot of people like that it's made out of corn rather than petroleum (personally, I don't care).

But yeah, it's pretty insane to use a PLA part on a plane.

Different groups of people designate street crossings and manage school buses. Ideally you're right, it should be fixed. Now get two different groups of people with different priorities to agree.

If you don't like the rule, manage it with school bus routing, but prepare to need twice as many route miles along lots of segments.

It's pretty counterintuitive for those used to working with macroscopic fibre composites. For example, glass fibre fill adds more strength than CF fibre fill (CF fibre fill adds more stiffness). Because it's not so much about the strength of the fibres themselves, but rather how well the polymer matrix grips the fibres.