So the logic is it is better for a man to unknowingly raise another man's child and stay married to his cheating wife than for the man to find out his wife cheated on him and divorce her?
Home DNA testing is also illegal in France, so they definitely seem to think that ignorance is bliss.
Edit: you've been breaking the site guidelines so frequently that I've banned the account. If you don't want to be banned, you're welcome to email hn@ycombinator.com and give us reason to believe that you'll follow the rules in the future.
Although that helps to deal with pickpockets, can't thieves still demand your passport at gunpoint/knife-point, if they know the police require you to carry it?
Reminds me of the way nuclear explosions contaminated all steel with radioactive fallout. For applications that require the lowest possible radiation levels they have to use steel created before the first nuclear bomb was detonated.
Haha it honestly would make a lot of work much easier. Instead we inject a little oxytetracycline into 1000s of fish which stains calcified structures and release them again in the hopes someone recaptures one or so x years later in the hopes they report it and there are y rings between the dark ring and the margin of the otolith/vertebrae.
Should be some type of nuke that would release weird isotopes but with minimal toxicity?
That’s true, but it’s more the timescale that helps. There’s a decent amount of radioactive background produced by cosmic rays hitting the upper atmosphere, much of it as gaseous elements that are easily incorporated into steel while smelting. It isn’t harmful at that level, but you do need to wait a few decades for those to decay away.
World War Two is rather convenient in that respect, as there are large quantities of steel that were left to sit around for several decades after those ships sank.
It’s been a while since I’ve done low-background gamma-ray spectroscopy, but I believe there were some setups that went even further, using lead that had been smelted by the Romans. That way, any contamination present at the time of smelting would have a few thousand years to decay away.
That would make sense, since the longest lifetime of an unstable copper isotope is ~13 hours, and so chemical separation plus a week of waiting would give you a low background. By comparison, iron has Fe-60, a naturally occurring gamma-ray emitter with a 2.6M year half-life, and 10 million years is too long to wait. For iron shielding, you'd need isotopic separation to remove the Fe-60, which is wicked expensive.
