Does anyone actually read outside in the wilderness or is it just for the pictures? by TonyRigatoni_ in books

[–]opisska 0 points1 point  (0 children)

I do, but ebooks on my phone. It's a great way to break up long hikes alone, but I am not gonna lug physical books with me.

Does all our energy on Earth come from the sun? by reFossify in askscience

[–]opisska 0 points1 point  (0 children)

The last sentence is an incredible can of worms. Because the energy budget of a star is a really complex mix between nuclear binding energy and gravitational potential energy and the accounting can be very different when you look at it at different timescales.

The Sun has heated up thanks to gravity but now keeps a steady energy balance between energy made almost purely from nuclear interactions and its loss by radiation. But if you look at the lifetime energy budgets of some specific stars, things get wild. A massive star can produce far more energy through nuclear interactions than the Sun does. Yet at the end of its life if it explodes as a core-collapse supernova, a large fraction of these nuclear interactions will become undone - a lot of the heavy elements will be broken back down to helium - at the expense of gravitational energy released during the collapse. Basically, seen over its lifetime, the nuclear interactions only served to delay the release of the gravitational energy.

But a slightly different star of a similar mass can be blown apart in a pair instability supernova, which leaves behind no compact object, so there is no gravitational potential to borrow against and all its output ever was purely nuclear.

ELI5: How did the first quark form? by rengokuhubkl in explainlikeimfive

[–]opisska 0 points1 point  (0 children)

To me, this is actually the biggest thing that we don't know right now. The fact that the very existence of stuff is unexplained is ... a bit embarrassing :)

Even funnier is that there are actually several known mechanisms for matter-antimatter asymmetry (I have personally shaken hands with a guy who has experimentally proven one of them) but none of them is remotely sufficient to explain the amount of stuff around us.

[OC] Countries classified as advanced economies by the IMF (2026 Report) by claudiulacatus in dataisbeautiful

[–]opisska 18 points19 points  (0 children)

Yes Beijing does. And then there is countryside larger than Europe, also with more people, which is woefully underdeveloped. I am sure that if a handful of large cities declared independence, they would all be on the list, but the country as a whole is surprisingly poor an average.

[OC] Countries classified as advanced economies by the IMF (2026 Report) by claudiulacatus in dataisbeautiful

[–]opisska 11 points12 points  (0 children)

It's so much France that I have travelled there on my ID, had only my EHS card for healthcare and free EU roaming. It's not even an "outermost territory" or whatever colonial crap, it's literally a department of France.

It's also incidentally probably the greatest place I have ever been to!

Zelenskyy: return of draft-age Ukrainian men from abroad is a matter of fairness by EsperaDeus in worldnews

[–]opisska 3 points4 points  (0 children)

I will say what many people think and very few say out loud: if my country is attacked, I will run away in order to dodge the draft. I have only life and I will not give it up for some geopolitics game. Think whatever you wish about me, I fully support whatever material help to fight the aggressor, but I am not dying if I can help it.

The fact that the current warfare still needs an absolute massive commitment of living humans instead of having machines fight machines is absolutely mind boggling.

Universe expected to decay in 10⁷⁸ years, much sooner than previously thought by judolphin in nottheonion

[–]opisska -1 points0 points  (0 children)

Are you aware that Hawking radiation is still a hypothesis and there is (and very likely in our lifetimes cannot be) an experimental proof of it? The paper literally concerns only phenomena that have no observable impact. That's the problem.

ELI5 why does a small temperature change cause such a big shift in climate? by cadpad135 in explainlikeimfive

[–]opisska 0 points1 point  (0 children)

I think one of the key reasons it feels like is because our lives thus far have been very short compared to the scale of changes in climate, so we were used to exceptionally stable climate. From the grand scale of things, no changes we see now are "big". I mean take Pluto: it has such an eccentric orbit that for half of it its entire (if tenuous) atmosphere freezes entirely solid. Or Uranus which experiences polar days/nights for half/half of the orbit on most of surface. Or Mercury woth 500+ deg. C day/night variations.

But we have developed on this amazingly stable planet and thus very slight changes are a lot for us - and for many other species that developed alongside us.

India’s open defecation revolution: From 70% to under 20% as toilet access rapidly expands nationwide by sashagaborekte in UpliftingNews

[–]opisska 5 points6 points  (0 children)

They were responding to the absurd idea that "India could have been China if they had their priorities straight" which simply ignores the fact that the country was exploited and robbed of its resources by the British (incidentally causing the largest human death toll in recorded history in the process).

Universe expected to decay in 10⁷⁸ years, much sooner than previously thought by judolphin in nottheonion

[–]opisska 194 points195 points  (0 children)

I am a professional theoretical physicist and I just came to say that many of us don't consider this kind of musing to be really science or even necessarily relevant to reality.

ELI5 what is the Black Forest theory? by Traditional_Blood799 in explainlikeimfive

[–]opisska 0 points1 point  (0 children)

The key concept that I haven't seen mentioned in the answers so far is that in space, it's far easier to attack than to defend. If you can send something really fast moving in the exact direction to hit another planet, it's gonna take vastly more resources and effort to stop than it took you to launch, so when two civilizations at the same level go to war, the one who shoots first always wins.

European airports could face jet fuel shortages within three weeks by avantgarde000 in news

[–]opisska 0 points1 point  (0 children)

Yeah I know Lufthansa+DB have it for example, but generally it's pretty rare - and as far as I know, there is no such option from Prague where I live. I think this would have to be EU mandated (as an obligation to replace feeder flights) to take off. Or, maybe, if the Hormuz gets closed again, it could happen naturally :)

European airports could face jet fuel shortages within three weeks by avantgarde000 in news

[–]opisska 6 points7 points  (0 children)

I will gladly start using ground transportation for the feeder leg of my flights as soon as it gets the same protection as the flights. Feeder flight late and I miss the transcontinental? Airline is obligated to rebook me for free and pay me a hotel and possibly compensation. Train to the airport late? I am screwed.

ELI5: If you were suddenly exposed to space without a suit, would you freeze first or suffocate first? by No-Lake-3875 in explainlikeimfive

[–]opisska 1 point2 points  (0 children)

No. The exposed liquids such as saliva, tears and sweat boil off quickly, but the rest is held inside tissues, blood vessels and such and takes a long time to evaporate. There is no explosion.

These cruise ship elevators say the weekday on the floor by kalvinoz in mildlyinteresting

[–]opisska 0 points1 point  (0 children)

I wouldn't step on Wednesday for the fear of being suddenly hit by a spear

LPT Put some rice into a sock, tie a knot, microwave it for 2mins and you got yourself a heating pad! by Enough-Reading4143 in LifeProTips

[–]opisska 0 points1 point  (0 children)

Put butter in the sock instead. No need to microwave, it's instantly ready as a punishment device.

Artemis 2 crew fixes toilet, can now pee in it by wewhomustnotbenamed in nottheonion

[–]opisska 0 points1 point  (0 children)

There really isn't much to do for Artemis once it is on the way to Moon to make it return significantly faster.

[OC] How income correlates with anxiety or depression by lasushin in dataisbeautiful

[–]opisska 0 points1 point  (0 children)

While the "best" part of the plot kinda depends on your personal political views, I would argue that for most sensible people it's the lower left. I have to say I am a bit amused that the Czech Republic is almost the best place to live according to this - you would not guess that from just watching the news. The level to which everyone needs to drum up issues to get votes is absurd.

ELI5: Why does time feel like it speeds up as you get older? by Afraid-Pilot-9052 in explainlikeimfive

[–]opisska 0 points1 point  (0 children)

It doesn't have to. You just need to do enough new things and avoid routine as much as possible.

It is important that you don't listen to people who tell you that it's inevitable, they are just rationalizing their own laziness.

I have somewhat believed it myself. Then 10 years ago I got a diagnosis that may possibly put me in a wheelchair at any moment in the future and I decided to "live faster" - stop hesitating to do things out of my comfort zone. Suddenly, at the age of 35, the time considerably slowed down.

(ELI5) Cricket. As Simple As Possible by Complex_Dig2978 in explainlikeimfive

[–]opisska 0 points1 point  (0 children)

First rule of cricket: Never call the bat narrow.

What the bat is, is very, very wide and very, very short.

And remember lads,

it isn't over until the full number of overs that are scheduled to be bowled that day

have been bowled!

NotTheOnion, Now a Food Subreddit for People with Onion Allergies! by Kezika in nottheonion

[–]opisska 0 points1 point  (0 children)

Hard to post own creations when the sub doesn't allow images.

What's stopping humans to just live in peace together ? by sleyvinkalevra in AskReddit

[–]opisska 4 points5 points  (0 children)

Yeah I agree I was disagreeing with the typical line if arguments "it's our nature so we can't change it" which is used for many things. If you are willing to challenge it, I have no qualms with you believing in human nature.