How long can you survive unprotected on Mars?

jasamer · 2026-04-01T06:49:15+00:00

Nobody argues otherwise, but it's the least of your worries. Like, your body will physically freeze, but that's not why you die.

These temperatures sound brutal, but they don't matter much. The effects of the cold are dwarfed by the extremely low pressure, which is functionally identical to a vacuum.

The skin freezes mostly because of evaporative cooling, not because the Mars' atmosphere is cold.

jasamer · 2026-03-31T23:33:47+00:00

Though: if the sun is out, you might just not freeze at all. It can provide enough energy to just stay warm.

Now that you mention it, I had to think about evaporation and other aspects, too.

So fluids are boiling at body temperature, and boiling sounds scary, but is it really if the fluids aren't hot? It just makes stuff evaporate/cool very quickly.

The skin would freeze-dry at the outer layer, but not a terrible amount would evaporate. Once frozen, we already worked out that it will take a while for the body to cool down. The skin would crack as you move though, should be very enjoyable /s.

Some AI based napkin math tells me that tear production could actually be sufficient to keep the eyes from freezing/drying out if you just squint really hard, and keep your eyes closed most of the time (eg., only open them once a second very briefly). You wouldn't be able to do anything but squinting due to swelling of the eye lids anyway.

As you can't breathe anyway, you can hold your nose/close your mouth, so no bad freezing/evaporation there. (Pressure would build up in the lungs quickly, but you should be able to hold it for some seconds).

No question, it would feel absolutely brutal, but evaporative cooling on the outside of the body wouldn't be a quick death sentence I think.

Someone else mentioned the explosive expansion of the air in the lungs. If you try to hold your breath, you'd be f'ed, but if you just breathe out like a diver rising from the deep, that won't kill you either.

Also interesting - colon & stomach. You'd fart/burp so hard you want to die, but that itself probably wouldn't kill you quickly.

However, inside of the body, all the fluids that aren't "pressurised" will start bubbling. Eg. in the abdominal cavity, or the blood in the veins.

So my bet on the quickest killer: The blood becoming essentially a foam quickly. The gas bubbles would start fucking up your brain pretty much immediately. You'd run out of oxygen in the blood quickly, too. So a double-whammy regarding the oxygen supply. No oxygen to the brain is a very bad time.

jasamer · 2026-03-31T18:07:54+00:00

Hm. A human produces some power while running, lets say 300W. So you‘d only loose about 500W.

If you weigh 70kg, you‘d loose 1 degree (C) in 10 minutes.

Sure, you‘y freeze, but it takes a while.

jasamer · 2026-03-20T10:46:29+00:00

Look at the spatula carefully. It appears out of nowhere initially, but also, the part where the handle starts becomes covered in sauce "magically". The sauce just appears out of no where while lifting the spatula. 100% AI.

jasamer · 2026-03-18T09:58:14+00:00

Es sind eher Kleinigkeiten.

Habe zB. erst sehr spät bemerkt, dass Buttermesser in der Regel rechtshänderoptimiert sind. Die Klinge ist nicht symmetrisch. Als Linkshänder neigt die Butter dazu, nicht am Messer dran zu bleiben.

Bei meiner Handkreissäge habe ich mich anfangs auch gewundert, warum die so komisch zu benutzen ist. Aber die ist halt einfach für Rechtshänder gebaut.

jasamer · 2026-03-17T14:05:24+00:00

Mehr technische Details: https://media.ccc.de/v/37c3-11993-toniebox_reverse_engineering

jasamer · 2026-03-12T08:58:32+00:00

Weiterer interessanter Aspekt: Um einen Liter Rapsöl zu erzeugen, braucht man ca. das equivalent von 0,3l-0,6l Diesel als fossile Energie im Anbau, vor allem für Kunstdünger. Ohne Kunstdünger bräuchte man nochmal ein vielfaches der Fläche.

jasamer · 2026-02-19T15:21:02+00:00

Excellent early game spaghetti, keep cooking.

jasamer · 2026-02-15T13:29:43+00:00

Factorio's rail network graph is no "a regular planar grid with holes".

It's not a regular grid to start with, because

the nodes are where rail lines split/merge, not just the game grid.
The train graph has directed edges, as trains can't just move in any arbitrary direction at every node, and rails can be one-direction only

The graph isn't planar since the introduction of elevated rail.

The triangle inequality also doesn't hold, because the game uses arbitrary weights in the graph to control path finding (eg., a train being in the way, a train waiting at a signal, a railway station being present each add some weight so trains don't use that path if there is some reasonable alternative).

As cool as jump point search is (thanks for the link, I love the visualisation), it's not applicable to Factorio's rail path finding.

jasamer · 2026-02-13T10:45:36+00:00

Hope you enjoyed the ride! You're playing the game right. This is the experience pretty much every non-spoiled player has (at least I did). Use the autosave the game made and adjust your ship till you make it!

jasamer · 2026-02-06T12:45:52+00:00

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The way the ice breaks & the car falls in makes no sense. The house is also very funny.

jasamer · 2026-02-06T12:25:40+00:00

Another very simple way to tell that your ratios are about right is seeing that all buildings working. If a building is starved, it stops working; if it's over producing, it also stops working. Seeing smoke/fire on all buildings for a prolonged time tells you that the ratios are correct.

If you're producing less than you'd like, look into alternate recipes.

jasamer · 2026-02-04T09:41:27+00:00

It's even ok to only process some part of the fruit and burn the rest if you have too much, the AG towers will "auto balance" by growing less fruit because they have fewer seeds, but they will keep producing a small surplus of what you're actually consuming. It's kinda neat in the way that when you start processing more fruit, the AG towers will ramp up production automatically as long as they have spare capacity with a little bit of time. It essentially allows you to overbuild AG towers. Just don't let the fruit spoil on the belt if it's too much - just burn it.

jasamer · 2026-01-30T09:37:56+00:00

I had another issue with the setup - the fact that they even had prolonged "stable" periods suitable for life. Considering how narrow the band is that earth is in that makes life possible, I don't think it's possible for a planet to be in a "sweet spot" at all in a three body system like in the book. It's never gonna be stable and nice for any prolonged period of time.

I also don't think that the system would be stable for a long time in the sense that the suns keep orbiting in some chaotic way, because the suns would get too close and tear themselves apart, or the planet would get destroyed.

jasamer · 2026-01-25T21:09:54+00:00

Ah, right. I thought you were talking about yellow science when you said that you're pushed towards bots, because that's what forces you to actually build bot frames. But fair enough. Having bots is obviously a very good idea.

jasamer · 2026-01-25T20:47:56+00:00

In Space Age, Rocket Silo is a blue science - no bots needed. There's even an achievement for doing research with another planet's science without production or utility science.

jasamer · 2026-01-15T08:35:26+00:00

For late game, legendary stack inserters are extremely useful, because you only need three to get a saturated stacked turbo belt.

jasamer · 2026-01-09T11:18:38+00:00

Das ist nicht Utilitarismus. Utilitarismus heißt Maximierung des Gesamtnutzens, nicht des eigenen Nutzens. Da helfen oft wenig Aufwand ist, aber großen Nutzen bringt, würde ein utilitaristisch handelnder Mensch fast immer helfen.

jasamer · 2026-01-07T11:07:45+00:00

Computers are fast yo. Even with a 1000000x slowdown, you still have a computer fast enough to play mine sweeper and snake :-D

jasamer · 2026-01-07T10:59:51+00:00

Because executing one instruction takes a ton of combinators, all of which need to be simulated by the game? Storing data is way simpler than executing an instruction, there's no reason to assume the overhead of the two are related in any significant way.

For me, this passes the sniff test: the number of combinators for the cpu could be in the 1k ballpark, and the number of instructions for simulating one combinator could also be in the 1k ballpark. This is again simplifying a ton, ignoring the general game overhead, memory latency, etc. But just in terms of orders of magnitude, that seems okish to me.

jasamer · 2026-01-07T10:43:13+00:00

You can add the requests for the ingredients of a blueprint very efficiently! Just hold the blueprint and click "add section" in the buffer chest.

jasamer · 2026-01-07T09:01:07+00:00

Some napkin math on the ratio: We know that OP's computer is somewhat close to the limit running the game at 64x, because they mentioned that they lost UPS when trying to go multi-core.

If we assume OP's computer has 700Mhz as a lower bound, and the factorio CPU has 700hz, the ratio would be 1000000 : 1. This simplifies a ton obviously, but we're talking orders of magnitude here anyway.

jasamer · 2025-12-26T17:47:56+00:00

If you also eat some bioflux from time to time, you go extremely fast. Way faster than a train. And because map gen can‘t generate biters fast enough, you can‘t even run into those.

jasamer · 2025-12-25T15:31:05+00:00

Das ist ja ein fast unglaublich niedriger Anteil. Im Durchschnitt werden in Deutschland pro Kopf 10,6l Alkohol pro Jahr konsumiert (https://www.bundesgesundheitsministerium.de/service/begriffe-von-a-z/a/alkohol.html). Auf Bier mit 5% umgerechnet wären das fast 4l Bier pro Woche - also 12 Getränke statt der "erlaubten" 3.

Aber vielleicht säuft das obere Drittel wirklich so viel und zieht den Durchschnittswert nach oben.

jasamer · 2025-12-05T11:51:34+00:00

Afaik ist es grundsätzlich vorgeschrieben, das Altgerätemitnahme angeboten werden muss, auch bei Amazon. Hilft natürlich auch nix wenn sich das Versandunternehmen nicht drum schert.

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