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Those are really great! Thx! TomB

That XKCD sketch looks off ... but I'm reading inconsistent things about the size: https://futurism.com/the-byte/big-m87-black-hole-compared-the-earth Either the numbers are wrong, or the "could just barely fit" comment is very off. I *think* I read elsewhere that the "size" of the event...

Naw, this would take a tiny spec of material. On a massive scale there would be problems, but the scale would have to truly massive. The bigger problem is getting the ship to survive, since it would be briefly overlaying core material. Thx! TomB

Last one is a hyperdrive flight through a planet that stutters the drive for a very brief instant to drop out of hyperspace and scoop up core material the go back into hyperdrive. Need very precise control and a very strong force field to hold the pressurized core material — which is high grade...

Swarm based weapons? Refractive invisibility for ships? Cyborg ship pilots? Improved planetary scale power distribution networks? Force field contained metallic hydrogen explosives? Planetary core mining hyperdrive stutter fields? Thx! TomB

Ok, found it: https://www.intellectualpropertylawblog.com/wp-content/uploads/sites/98/2019/03/Fourth-Estate.pdf Bold added by me. The central question which was decided is when a copyright is registered: When the application for registration was made, or when the registration was granted...

Are y’all reading this correctly? My read is that you already needed to register to recover damages. The ruling allows you to now recover damages retroactive to registration. Thx! TomB

Sure. But they don't have anything to do with what Toys R Us was selling. Financial miss-dealings are a hazard to all corporations. I agree that there is a misfortune in this case to the sellers that operated through Toys R Us. But that is a specific misfortune which ought not to be used to...

Isn’t this more “Good thing Toy’s R Us” was not a major sales outlet for D&D? And, what do financial misdealings have to do with toys or games anyways? The connection here is coincedental, not causal. TomB

These are good reads as well. I'm finding the last (artzok) to have a *lot* of good pointers, including examples of typical mistakes, which is a good indication that the writer is an expert: https://www.mybluprint.com/article/an-easy-method-for-mixing-acrylic-paint-for-skin-tones...

Using fusion for propulsion is a bit different than using it to generate electrical power. I don’t know that our failure to generate power means we can’t make a fusion drive. (There is a lot of solid research on this ... do a search on interstellar rocket motor.) Thx! TomB

I dunno ... see, for example Italy and Japan, which are losing population because of very low birth rates. Thx! TomB

There are answers (4), which is to provide better education, especially to women, and to provide more reproductive control to women, and (5), have economic policies that incentivize lower birth rates (basically, make it such that one's offspring do better if there are fewer of them, generally...

But, do they change because they are forced to by external influence, or do they change because they are inherently unstable? Aboriginal culture, which was isolated until relatively recently, was apparently stable for at least 50,000 years. Also, "static" vs "non-static" is too crisp...

If we can set some parameters: (1) How close are possible target systems? The Centauri system is closest at 4.2 LY, and Proxima Centauri has a candidate planet. If that planet is habitable, that would be great luck. But we don't have enough data yet. There are other candidates out to...

I agree that there is a moral problem. But, I don't think this prevents a generation ship from being built. I do think this issue will cause problems in later generations, unless the ship is truly massive -- on the scale of Starship Warden, which held about 1.5 million people. Sure. But...

So ... I don't think it has been set what is the ratio of the ship's population to the number of roles which would need to be filled. There might be 1000 people and just 100 distinct roles. We also haven't specified how many roles a single person can cover. Given that they might not have much...

I agree that having to live in a highly constrained society would likely cause all sorts of problems. I don’t know if they are unsurmountable. People are adaptable and resilient. I worry more about long term stability. Gradual drifts into failure modes. Also, I agree that social management...

If we can get past what particular label best fits, certainly, the lives of ship dwellers would be extremely constrained. Though, this seems to be an ethical/moral issue rather than a feasibility issue. As a related issue, one of the ways to manage the community would be to flat out lie. But...

What I remember is that what differentates the twins is that one stayed in an inertial frame of reference, while the other does not. In the looped universe case, wouldn’t the paradox still occur if both twins start in the same frame, then only one is boosted? (Edit: Hmm, but then again, what...