HNHacker News
TopNewBestAskShowJobs

pvaldes

6,315 karma · joined January 13, 2013

You can find me also in perlmonks as pvaldes.
submissionscomments
pvaldes··on Larger Pacific striped octopus
Extra warm waters maybe. A lot of animals seem to be acting strange in the last years.
pvaldes··on Larger Pacific striped octopus
Sometimes, yes. Many invertebrate research is done almost for free, so it takes what it takes.
pvaldes··on How Climate Resilient Are the Largest Cities?
Some foods yes, there are huge fisheries, but not agriculture. (I admit that should had been more precise in my post)

After the British Columbia University web, Canada still seems to import like a 75% of the fruits and a 50% of the vegetables eaten by Canadians (excluding potatoes). Apparently, this is one of the problems with the tariffs.

pvaldes··on How Climate Resilient Are the Largest Cities?
At -20 Celsius we will eat more meat, not less.

I'm having a headache trying to parse the first paragraph, but definitely we didn't beat the photosynthesis. Not yet.

pvaldes··on How Climate Resilient Are the Largest Cities?
Really smart point.

The problem is not that we couldn't improve cities to sustain -30 Celsius winters. This is doable. The problem is that places suitable for agriculture would vanish in the upper half of the continent. Canadians need to import many of their food and they are like 40 million people, Europe would need to find a way to feed 500 million people.

Cities resilience to war will be a concern much before climate resilience.

pvaldes··on Eiffel Tower employees strike after female staff removed
If the history is real, it seems that a group of Hindi visitors created a trouble by requiring the removal of female staff during his visit to the tower. The people at charge accepted, instead to stand their ground. Employees started a strike on protest for several days. As stupid as it sounds.

Just because you are a little "special" and unable to see women as equals, shouldn't have the right to remove every woman from a public monument in France. French laws forbid to block women from the use of public space, and to be discriminated at work.

This is just another test for boundaries. The rights of those women were attacked. The people at charge had most probably commit a crime when they made the tower "only for men" and any money received for it should be returned. New laws should forbid directly the use of public European monuments by any men claiming that can't stand the presence of women on the same place.

pvaldes··on Icy Moons Are Ocean Worlds
I would propose to use xenoceans for any ocean out of the Earth. From Xenos = alien. They are different enough in structure and composition to deserve their own name.

Iceans may be confusing, as it does not suggest a liquid stage under the platform, and ice suggests presence of water in something that is not necessarily composed of water, but the second layer of ice created by pressure is something never found before for sure, so it may deserve a chance.

Very cool worlds. Finding an entire alien marine ecosystem would be incredible.

pvaldes··on Please don't rearrange our shoes when we turn up, paramedics in Japan urge
True fact.

Relatives in an emergency often act irrationally. I heard of an old case where a man suffered a heart stroke, and his child was ordered to phone rescuers. The boy ran to the nearest phone booth, said "my father is very ill, we need an ambulance" and hang the phone. He never said where. The ambulance roamed around trying to guess the address of the emergency, but when they found the family in the street it was an hour later and the man was dead.

pvaldes··on Icy Moons Are Ocean Worlds
Just some thoughts

1) Animals can synthesize "rocks" with hard materials that will sink naturally, but that are buoyant while their owners are alive. This means that we can expect a thin layer of a fake "rocky" bottom in form of Thanatocenose just in the surface of the second layer of ice. Bony or Shelly bottom would be a better way to define it.

---------------------------

2) If those hypothetical mineral resources are rare, organisms would be hard pressed by evolution to start collecting them.

Some animals collect pebbles to make pods. If the upper ice layer was created after the lower ice layer we may find aliens dressed on a meteorite's cape. This meteorites don't necessarily need to sink if included in the body of an organism. The Earth developed similar solutions that can be colonial, like Sabellaria worms, or individual, like caddisfly larvae.

Fill this pods with organisms able to extract the energy of chemical links in those rocks, and you have food and refuge in the same packet. Go a little further and you developed luminescence. We can't guarantee that this life evolved eyes, but bioluminescence is the most popular way to communicate among life beings on earth so if aliens didn't evolved eyes the alternative solutions will became very bizarre and unexpected really fast.

------------------------------------

3) Maybe we will not need to dig all the way down to find life. Biocenosis will fit every possible niche, so is 100% guaranteed that the transition "upper ice layer" -> "liquid surface" will be colonized by life.

First because it poses a topological advantage (halves the directions of possible attacks by predators, and allows predators to ambush and hide in irregular ice).

Evolution later would select organisms that burrow up in the ice layer. Burrows are a safer place to rest and nest than just a surface of ice, so the trait would be selected fast by evolutionary pressure. We can expect tunnels shaped as and 'A' populated by filterers also. They will create currents between an entry and an exit to use the energy more efficiently

So we may suspect the presence of life if we can detect indirectly a thin layer in the ice/water frontier that: a) is less dense than ice, but more dense than liquid or gas bubbles, and b) is structurally different than what physics would predict for the formation and extension of ice cracks.

And if there aren't any alterations in this boundary, it may be no life at all, or life may be very rare.

pvaldes··on Dutch central bank moves share of gold from U.S., Canada to London
We have to take in mind that Russia is also barely alive and on life support

Putin only has one good exit: to fake a strength that at this moment it does not have, and declare the "victory", in the current broke state of this mess. They would try to trick Ukraine to be polite and let them to keep the occupied territories. They would also need to ask the west to remove the sanctions pretty please.

I assume that after all the pain endured, Ukraine will refuse this solution of returning to the starting point where Russia ask for everything and concedes nothing in return. They would had endured all this fighting years and destruction all for losing a quarter of their country. Would be insane to accept this.

And the idea that EU, or Finland, or Poland will accept Baltic states being taken and Russia at their gates is just... hypothetical

Other possible outcome is that EU will not commit this mistake twice, knowing that they are the next in the menu in five years.

So we are again in a false end. Is very unlikely that the war will stop just at time for the midterms.

Putin is insane, is asking again Russian women to make more babies for keeping the war machine greased, and can't be trusted to keep their word to not invade further.

pvaldes··on Please don't rearrange our shoes when we turn up, paramedics in Japan urge
There are emergencies and emergencies, but removing your protective gear when you are entering in a emergency scenery is an horrible idea by several reasons.

After thousands of interventions in this places, you are basically guaranteed to step while in your sockets on blood, syringes, broken bottles and glass pieces. Awful idea. Your toes smashing the leg of a table if you have luck. Hepatitis or HIV if not.

Also removing shoes that were designed to assure maximum stability before to enter in an unknown scenery can be a big mistake. You will regret it later, trying desperately not slip while you navigate a stretcher on a narrow spiral staircase, carrying a heavy guy with a fractured leg.

pvaldes··on Private German rocket makes history, reaches orbit from European soil
> And the recent explosion in US activity, specially SpaceX is also highly separated from Europe.

If any of this machines use Python or Linux internally, then we could find some obvious connections with Europe and the people at charge of it.

pvaldes··on Icy Moons Are Ocean Worlds
Beautifully designed article. Very cool images and diagrams.

> We want rocks in contact with water,

But there is ice compressed between the water column and the xenoceanic bottom, ok. I see the problem.

What about rocks in the surface of the water?. Some volcanic rocks can float.

pvaldes··on Private German rocket makes history, reaches orbit from European soil
> Have there been other rocket launches from continental Europe?

Yes. A Spanish private company launched the Miura 1 from Huelva (South of Spain) in 2023.

In any case it was programmed to reach only 46 Km high in the first attempt, and suffered damages after landing in the ocean at the expected coordinates.

It seems that a loan to finish its successor, the reusable rocket Miura 5, were granted in April of this year and that its first test flight is expected for the end of 2026, so Germany is not the only European country trying this.

pvaldes··on You Don't Have a Right to Safe Drinking Water, US Court Rules
> I don't think there's any reason

Environmental Protection Agency and Food and Drug Administration used to think the opposite when they were at charge of the Toxic Substances Control Act (TSCA).

Sadly EPA and FDA are being back-stabbed and slowly murdered by Republicans since 2025 (Yes, like with Voldemort, is important not to be afraid to say it loud). And the death by a thousand cuts had been surgically designed to destroy any capability to prosecute crimes related with the TSCA.

So if you live in USA you are alone on this. You better do your homework and learn as fast as you can. Scientific Journals are your friends. There is an incredible increase of unexpected knowledge about digestive regulation published since the 90's. Forget about miraculous fruits and start your journey with the adipokines.

Meanwhile the world keeps moving. In Europe, since Jan 2026, water suppliers will be required to comply with a parametric value of 2.5μg/L for BisPhenol-A in drinking water, after scientists discovered than it can leak in the hot-water faucets. People sometimes refill their teapots with hot water before to turn on the kitchen.

What is RFK up to lately? Any exciting changes? He found another racoon?

pvaldes··on You Don't Have a Right to Safe Drinking Water, US Court Rules
The authorities assuring that the drinking water that is sold to you is really of drinking water grade is the most basic of the basic rights. Not a luxury. The "right to culture almonds" or to have a pool is a different question.
pvaldes··on You Don't Have a Right to Safe Drinking Water, US Court Rules
> I'm not sure what a right to water really means.

Right to safe water. It means that the water in your kitchen faucet is expected/guaranteed to be safe to drink.

It must not have: noxious bacteria causing diarrhea, or liver parasite eggs, or mud, or mercury/heavy metals, or remains of faeces, or fracking methane, or pesticides, or medicines, or obesogens [1].

It must had been professionally filtered and treated to assure that none of those reach your home.

If you pay for water classified as "drinking water", you should not receive grey water, soapy bubbles, oily mud or anything else. This is the standard in all first country nations and I assume that it should be the same in US.

[1] And if in your small town everybody is obese, before to blame everybody for eating too much, or being lazy couch potatos, look for chemicals in the drinking water, leading to a broken satiety system, causing people to eat huge amounts of food. This is why the right to have safe drinking water is so important.

pvaldes··on A Million Falcons Went Missing. Here’s How They Were Found
Resume: A type of small kestrel migrates each year to some place in Africa, nobody knew where, until now.
pvaldes··on Why are European countries moving their gold out of North America?
> the American people can't even support a war against Iran

The American people can't even support a war against their own government. A government that they ruminate, "may be" or "may not be" a team of Russia/Israel assets with the goal to grab every dollar and to turn USA into a dystopia.

At this moment nobody can even assure with full certainty that there is not a bomb buried yet somewhere in the WH.

pvaldes··on Artificial beaver dams saw juvenile coho salmon survival rates go from 8% to 60%
So obvious, but Argentinian government didn't see it coming. Thousands millions of dollars in damages caused by amateurs with power in Argentinian government.

Another example: Beavers are native from Sweden, but beavers on Sweden should be removed.

pvaldes··on Scientists Find Worms in Almost Every Fish in a Tuna Haul – 96% Were Infected
Larvae are tiny and translucent and mold with each jump from one host to the next,

I can assure you by direct experience than the adults colonies could pass for a noodless dish at the first look.

pvaldes··on Scientists Find Worms in Almost Every Fish in a Tuna Haul – 96% Were Infected
The culprits, in this particular case, are the fishermen.
pvaldes··on Scientists Find Worms in Almost Every Fish in a Tuna Haul – 96% Were Infected
Assuring than no undesirable worms reach the table, ever, is the main reason of Japanese having developed sushi. Every fish in Japan destined to be served as sushi is ultra frozen first
pvaldes··on Artificial beaver dams saw juvenile coho salmon survival rates go from 8% to 60%
We need a professional approach there, able to see the whole picture. Amateurism can be really expensive.

Sometimes beavers are a big mistake. Hazelnuts and willows can be chopped to the ground and just will return stronger and more dense. Poplars will regrow from the roots at some distance. Argentinian trees they will vanish instead. This happens because temperate South American forests never evolved with beavers. On this places they may done more harm than good.

pvaldes··on Mom gets 6-month suspended sentence for letting 5-year-old walk to the pond
Most probably kidnappers and pedophiles found a better way. Kidnapping small children has been institutionalized.

And before to say that I'm crazy or trolling, we need to remind that some estimates claim that until 300,000 small immigrant children could had vanished in the last decades after being taken by the USA government. Even if the real value is a tenth of that, we would be still talking about a very concerning and astonishing cipher

And we need to remind that ICE has happily employed some very seedy people lately. Journalists disclosed some workers with a criminal past that includes sexual assaults to minors and that wouldn't be allowed to work with minors in any other circumstance.

The sad truth is that lots of recent recordings prove that criminals are now allowed to shop for children in the streets and parks and take them somewhere with them, as long as this children aren't white. And some of this children are not seen again. Nobody in the government can explain were they went.

pvaldes··on Mom gets 6-month suspended sentence for letting 5-year-old walk to the pond
pond != school.

Ponds are notoriously unsafe and even treacherous for small kids.

In any case this is law enforcers overreaching and creating unneeded and useless trauma in the family just because they can. Should never went so far.

pvaldes··on Artificial beaver dams saw juvenile coho salmon survival rates go from 8% to 60%
I will chose to make a bridge or detour a road once via collective effort, over rebuilding the entire burnt village every ten years. Beaver territories stop wildfires, and they take care of the forever maintenance of the firewalls for free, releasing tax money that can be spent in better things.

They also provide an invaluable service slowing floods, creating fisheries for humans, and increasing touristic appeal from a location (we are naturally attracted by the aesthetics of watching water). Ponds also create relatively safe sanctuaries where wildlife, cattle and humans can retreat in case of wildfires.

So, yes, there are many cons, but also many pros. Beavers compete with us for low places and shouldn't be allowed everywhere, but to eliminate them from every place is also a mistake.

pvaldes··on Mamdani bans AI in NYC schools
Teachers earned their titles, they had to prove repeatedly that they are fit for a job that includes proving that you can learn things, that you have a logical thinking, that you are a decent enough person and that you have developped the social skills to lead a bunch of volcanic young people, taking the best paths to their grow and benefit.

AI is just the weird guy that sneaked its way in, without any reference. That is know to lie often in a very convincing way, specially when it does not have an answer, and that can be persuaded to include a lot of weird random ideas or fake facts in their classes.

pvaldes··on Record baby boom brings heaviest parrot back from the brink
Hum...

Is this a warning that the trees are suffering?

pvaldes··on Astronomers Detect a 10-Sided Structure in Saturn's Atmosphere
Taking in mind the gyrating hexagon that seems unique in the solar system (rings had been found in other planets) I propose to rename the sixth planet to Hexaturn.

(Or at least that particular cloud. The name is too good to not use it)

← PreviousPage 4 of 34Next →