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OpenCiv3: Open-source, cross-platform reimagining of Civilization III

https://openciv3.org/
450•klaussilveira•6h ago•109 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
791•xnx•12h ago•481 comments

Show HN: Look Ma, No Linux: Shell, App Installer, Vi, Cc on ESP32-S3 / BreezyBox

https://github.com/valdanylchuk/breezydemo
152•isitcontent•6h ago•15 comments

Monty: A minimal, secure Python interpreter written in Rust for use by AI

https://github.com/pydantic/monty
143•dmpetrov•7h ago•63 comments

How we made geo joins 400× faster with H3 indexes

https://floedb.ai/blog/how-we-made-geo-joins-400-faster-with-h3-indexes
19•matheusalmeida•1d ago•0 comments

Dark Alley Mathematics

https://blog.szczepan.org/blog/three-points/
46•quibono•4d ago•4 comments

A century of hair samples proves leaded gas ban worked

https://arstechnica.com/science/2026/02/a-century-of-hair-samples-proves-leaded-gas-ban-worked/
84•jnord•3d ago•8 comments

Show HN: I spent 4 years building a UI design tool with only the features I use

https://vecti.com
257•vecti•8h ago•120 comments

Show HN: If you lose your memory, how to regain access to your computer?

https://eljojo.github.io/rememory/
191•eljojo•9h ago•127 comments

Microsoft open-sources LiteBox, a security-focused library OS

https://github.com/microsoft/litebox
320•aktau•13h ago•155 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
317•ostacke•12h ago•85 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
403•todsacerdoti•14h ago•218 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
328•lstoll•13h ago•236 comments

PC Floppy Copy Protection: Vault Prolok

https://martypc.blogspot.com/2024/09/pc-floppy-copy-protection-vault-prolok.html
19•kmm•4d ago•1 comments

Show HN: R3forth, a ColorForth-inspired language with a tiny VM

https://github.com/phreda4/r3
50•phreda4•6h ago•8 comments

I spent 5 years in DevOps – Solutions engineering gave me what I was missing

https://infisical.com/blog/devops-to-solutions-engineering
110•vmatsiiako•11h ago•34 comments

How to effectively write quality code with AI

https://heidenstedt.org/posts/2026/how-to-effectively-write-quality-code-with-ai/
189•i5heu•9h ago•132 comments

Learning from context is harder than we thought

https://hy.tencent.com/research/100025?langVersion=en
149•limoce•3d ago•79 comments

Make Trust Irrelevant: A Gamer's Take on Agentic AI Safety

https://github.com/Deso-PK/make-trust-irrelevant
7•DesoPK•1h ago•3 comments

Understanding Neural Network, Visually

https://visualrambling.space/neural-network/
240•surprisetalk•3d ago•31 comments

I now assume that all ads on Apple news are scams

https://kirkville.com/i-now-assume-that-all-ads-on-apple-news-are-scams/
985•cdrnsf•16h ago•417 comments

Introducing the Developer Knowledge API and MCP Server

https://developers.googleblog.com/introducing-the-developer-knowledge-api-and-mcp-server/
21•gfortaine•4h ago•2 comments

FORTH? Really!?

https://rescrv.net/w/2026/02/06/associative
43•rescrv•14h ago•17 comments

I'm going to cure my girlfriend's brain tumor

https://andrewjrod.substack.com/p/im-going-to-cure-my-girlfriends-brain
58•ray__•3h ago•14 comments

Evaluating and mitigating the growing risk of LLM-discovered 0-days

https://red.anthropic.com/2026/zero-days/
36•lebovic•1d ago•11 comments

Female Asian Elephant Calf Born at the Smithsonian National Zoo

https://www.si.edu/newsdesk/releases/female-asian-elephant-calf-born-smithsonians-national-zoo-an...
5•gmays•1h ago•0 comments

Show HN: Smooth CLI – Token-efficient browser for AI agents

https://docs.smooth.sh/cli/overview
77•antves•1d ago•57 comments

Show HN: Slack CLI for Agents

https://github.com/stablyai/agent-slack
40•nwparker•1d ago•10 comments

The Oklahoma Architect Who Turned Kitsch into Art

https://www.bloomberg.com/news/features/2026-01-31/oklahoma-architect-bruce-goff-s-wild-home-desi...
20•MarlonPro•3d ago•4 comments

How virtual textures work

https://www.shlom.dev/articles/how-virtual-textures-really-work/
28•betamark•13h ago•23 comments
Open in hackernews

Medieval Africans had a unique process for purifying gold with glass (2019)

https://www.atlasobscura.com/articles/medieval-african-gold
141•mooreds•8mo ago

Comments

gregschlom•8mo ago
This made me realize that I have absolutely no idea what was going on in Africa during medieval times (and only a sliver of an idea in Europe).
jihadjihad•8mo ago
Mansa Musa is totally worth reading about, as are philosophers etc. like Ibn Khaldun and others (Ibn Khaldun wrote about Mansa Musa's pilgrimage, wealth, etc.).

There was a lot going on in medieval Africa, I wish I had some good sources, if anyone knows any I'd be interested in expanding my knowledge as well!

petepete•8mo ago
There are episodes of In Our Time on The Empire of Mali (incl Mansa Musa) and Ibn Khaldun

https://www.bbc.co.uk/programmes/b06kgggv

https://www.bbc.co.uk/programmes/b00qckbw

jorgen123•8mo ago
The wikipedia page about the Mali Empire [1] has a few books in the Further Reading section. This one looks promising: African Dominion: A New History of Empire in Early and Medieval West Africa [2]

[1] https://en.wikipedia.org/wiki/Mali_Empire

[2] https://www.goodreads.com/book/show/34928286-african-dominio...

KolibriFly•8mo ago
Same here, most of what I learned growing up barely touched on African history beyond Egypt or colonialism. Stuff like this really highlights how much was going on
vagrantJin•8mo ago
Lost history. You probably know the reasons. Many cultures within relied heavily on knowledge keepers, or griots, which was a perfectly fine system until it wasn't.
teleforce•8mo ago
Fun facts, Mansa Musa (Musa Keita) who's king in Mali Empire in Western Africa is the richest person ever lived [1].

It's reported that he unintentionally disrupted Eqyption economy for at least ten years. He did that by spending and giving charity in gold enroute to pilgrimage or Hajj in Mecca while staying about 3 months in Egypt. Allegedly he had hundred camels in towing, each camel carrying hundreds of pounds of pure gold. Pilgrimage to Mecca is the journey that every Muslim has to make once in a lifetime if they can afford it.

[1] Mansa Musa: The richest man who ever lived (105 comments):

https://news.ycombinator.com/item?id=19350951

[2] Mansa Musa:

https://en.wikipedia.org/wiki/Mansa_Musa

https://news.ycombinator.com/item?id=19350951

opo•8mo ago
As your wikipedia link states:

>...While online articles in the 21st century have claimed that Mansa Musa was the richest person of all time,[91] historians such as Hadrien Collet have argued that Musa's wealth is impossible to calculate accurately.

We don't know the exact wealth of Manda Musa and there really isn't a good way to compare wealth between different eras. Even in the same general timeframe, wouldn't the khanates of the mongol empire be considered more wealthy?

teleforce•8mo ago
Nobody really know for sure to be honest but he's most probably one of the top ten.

The linked BBC article in the HN post has the list for top 10 richest man in history with Mansa Musa at the very top but Shah Jahan the Mughal Emperor who's the owner of Taj Mahal is not even in the list [1].

The 10 richest men of all time:

1) Mansa Musa (1280-1337, king of the Mali empire) wealth indescribable

2) Augustus Caesar (63 BC-14 AD, Roman emperor) $4.6tn (£3.5tn)

3) Zhao Xu (1048-1085, emperor Shenzong of Song in China) wealth incalculable

4) Akbar I (1542-1605, emperor of India's Mughal dynasty) wealth incalculable

5) Andrew Carnegie (1835-1919, Scottish-American industrialist) $372bn

6) John D Rockefeller (1839-1937) American business magnate) $341bn

7) Nikolai Alexandrovich Romanov (1868-1918, Tsar of Russia) $300bn

8) Mir Osman Ali Khan (1886-1967, Indian royal) $230bn

9) William The Conqueror (1028-1087) $229.5bn

10) Muammar Gaddafi (1942-2011, long-time ruler of Libya) $200bn

[1] Is Mansa Musa the richest man who ever lived?

https://www.bbc.com/news/world-africa-47379458

jl6•8mo ago
Mansa Musa’s headline story is that his spending caused inflation in Egypt. I understand that estimate of Augustus Caesar’s wealth is based in part on him considering Egypt, in its entirety, to be his personal possession. It feels like “owning the whole country” should probably outrank “causing inflation in that country”, it’s probably meaningless to try to compare across such vast gulfs of time and place.
notahacker•8mo ago
Musa had an empire too, one that possessed so much gold that his holiday tips devalued the principal store of wealth in foreign countries. Agree the comparisons aren't particularly meaningful; a lot depends on whether your consider having lots of gold to show off with to be more valuable than building an industrial empire, or even owning a bunch of now-common consumer goods and having access to healthcare more impressive than anything Augustus or Musa bought
wqaatwt•8mo ago
Problem is that gold is only worth as much as you can buy with it. If there aren’t enough goods it’s actual price will drop by many times
LunaSea•8mo ago
Aren't Bezos, Musk, Gates & co richer the first half of the people on the list?
flohofwoe•8mo ago
Not until one of them buys the entire US armed forces, installs himself on the throne in Washington and declares all of California his own personal property - just to draw a parallel to the number 2 spot ;)
euroderf•8mo ago
Soon.
rayiner•8mo ago
The fact that none of them could come close to doing that aptly illustrates why they’re not nearly as wealthy as those in the past.
saagarjha•8mo ago
fwiw Mughal≠Mongol
bernds74•8mo ago
Some guy once famously noted that wealth is not measured in gold or silver, but in goods and services. Mansa Musa didn't have a Ferrari F40, or an RTX4090, or air conditioning. He couldn't buy a trip to low earth orbit or get cancer treatment if he needed it. Many people in this day and age are vastly more wealthy than he was.
Winsaucerer•8mo ago
That's definitely a reasonable way to think about it. Another though is in terms of social status and ability to direct human labor, in which case most people are not more wealthy.
Retric•8mo ago
On that scale Xi Jinping is likely the richest person to ever live. https://en.wikipedia.org/wiki/Xi_Jinping

You rarely see modern dictators on these lists but populations and economic prosperity have exploded to the point where historic kings can’t really compete.

Winsaucerer•8mo ago
I actually do think of him as a candidate for wealthiest person to have ever lived.
tonyhart7•8mo ago
yeah but he is "only" leader, he don't own entire china economy
Retric•8mo ago
“social status and ability to direct human labor” doesn’t require ownership just control.

In the US congress controls in the funding, but in a dictatorship the guy at the top can unilaterally allocate billions and then manage how it’s spent. It’s not total control of all government assets but it is control of a significant fraction of a modern economy.

Just as a thought experiment, suppose he wanted to fund Doctors Without Borders or some other international charity. Do you really think he’d have trouble sending the equivalent of 1 billion USD in Chinese government funds to that org? How about 2 billion? Obviously at some point it wouldn’t work but where exactly that line is says a lot about the power he has.

rayiner•8mo ago
That one way to measure wealth. Another would be to measure it in terms of how much labor you can get from your fellow humans. Mana Musa was far more wealthy by that measure.
rcxdude•8mo ago
Indeed, it depends. I think the way this list works it's relative to the available resources at the time, i.e. what percentage of the available wealth did they control?
throw__away7391•8mo ago
I visited the Biltmore Estate years ago, the home of the Vanderbilt family. It occurred to me during the tour that all the end result of all this wealth was approximately equivalent to having a 5 bedroom McMansion. A huge percentage of the sprawling property was dedicated to housing servants who performed tasks like laundry, changing the water in the (pre-chlorine) pool, taking care of the horses and carriages of visitors, or preparing meals that today are mostly completely automated or unnecessary. The end result was housing the owners and a few guests in conditions substantially worse than the average modern suburban home.
AngryData•8mo ago
But by that argument we are all dirt poor, provided humanity isn't wiped out, because future generations will have more technology than us. Which to me is kind of a worthless way to measure how wealthy anybody is.
wqaatwt•8mo ago
It is if you compare yourself to other people living around you or at the same time. After all they are the ones your competing for a limited amount of resources with.

Comparing the wealth of people who lived hundreds of years ago in entirely different societies/economic systems is quite pointless, yes.

brandonfro•8mo ago
Yeah, but this completely ignores the relative access to resources as others at the same time. That’s kind of the point at specifying a date for these discussions. If a cure for cancer existed during the time Musa was alive, you can rest assured he would have had access to that information and those services.
jjk166•8mo ago
Sure Musa didn't have those things, but not because of a lack of wealth. There is no point that you could increase his wealth to such that he would be able to afford those things. It takes some amount of resources and labor to produce an air conditioner, and Musa definitely could afford those resources and labor. Likewise, you are not richer than Carnegie or Rockefeller because you happen to own a microwave, you have orders of magnitude less capability to procure resources and labor, even if you have access to a slightly different set of resources and labor. Whatever you can currently afford, they would be able to afford if they were to spend their wealth in today's markets.
aquova•8mo ago
Is there a reason this list wouldn't include any of their successors, who inherited the vast majority, if not all, of their holdings? Did Tiberius not inherit enough of Augustus's wealth to make this top 10 as well?
anton-c•8mo ago
Iirc he gave some to his wife(?)

Anyone who had multiple people in their will diluted it. Though I feel Augustus got all of Julius' will which goes against this, I imagine powerful people might have a few people they want to leave something for when they die.

wqaatwt•8mo ago
> wealth indescribable

That’s kind of the problem.. even if we knew the amount of gold he actually had and multiplied it by its current market price the resulting figure would be entirely pointless. The question is how much stuff he could buy for it back in the 1300s. If there wasn’t enough stuff/people to buy having a massive hoard of illiquid gold doesn’t necessarily make you extremely wealthy.

Including absolute monarchs and dictators in the list is also semi meaningless.

Also the the way you chose to measure this wealth results in massive variance. E.g. Jacob Fugger was allegedly worth $400 billion if adjusted by inflation but he’s not even here.

yieldcrv•8mo ago
Mansa Musa was illiquid and could not exchange much wealth for goods and services and had nothing to invest in during a time where the gini coefficient around him would have been 1.0

It is marvelous he found gold and even then he could only give it away freely

romaaeterna•8mo ago
Document-only claim without any archeological support means that I'm highly skeptical.
dyauspitr•8mo ago
That’s the vast majority of antiquity unfortunately.
romaaeterna•8mo ago
In Classical history, we've got a number of competing historiographers that we can compare with each other, and a large about of archeological remains. Our estimates of how wealthy any given period of the Roman empire was are based on numismatics, built artifacts, etc. In comparison, this sort of thing is just a wild claim taken at face value (also something not done in Classics).
wqaatwt•8mo ago
Presumably his wealth would go down massively in PPP terms since if gold was so abundant in Mali back then its buying power couldn’t be that high.

In a way it’s similar to the Spanish silver mines in the New World it resulted in a significant increase in prices and a lot of wealth shifting around.

detourdog•8mo ago
What I love about the process is that it seems to have developed by playing with fire.
JumpCrisscross•8mo ago
> it seems to have developed by playing with fire

Or someone melted down a glass and gold object and noticed the gold that floated (precipitated?) out was purer than that which went in.

defrost•8mo ago
Which is literally playing with fire.

Even today various artists playing with fire rediscover that while gold doesn't naturally work into or onto glass it's still possible to adhere gold to glass if the timings and tempreptures are "just right".

motorest•8mo ago
> What I love about the process is that it seems to have developed by playing with fire.

Also known as experimentation, which is the whole basis of the scientific process.

detourdog•8mo ago
What is the difference between the two? No where else did the scientific method develop this process. Play can produce surprising results and methodologies stagnates development.
motorest•8mo ago
> What is the difference between the two?

There isn't.

Referring to experimentation as "playing with" feels like a attempt to demean the output.

euroderf•8mo ago
"playing around with" sounds more dignified.
detourdog•8mo ago
I don't perceive the difference. "working with fire" maybe different but I'm still fine with my word choice.
detourdog•8mo ago
Sometimes it's best to interpret things in a neutral way. A negative point of view hampers insight. I think the output speaks for itself and doesn't need a defense.
rdlw•8mo ago
Only if you think there's something wrong with play.
rcxdude•8mo ago
"Remember kids, the only difference between screwing around and science is writing it down" - Adam Savage
rsynnott•8mo ago
I mean, you could say that of basically all metallurgy prior to the 19th century.
detourdog•8mo ago
Ok lets say that.
cardiffspaceman•8mo ago
Same for Vulcanization.
kleton•8mo ago
This is called cupellation. Romans used clay crucibles
declan_roberts•8mo ago
Cupellation is considerably earlier than this method. Some 2,000 years earlier. Cupellation is also very effective at removing base metals.

I'm curious how pure they get gold with this glass method. If it's not as pure as Cupellation then that would explain why it wasn't widely used outside of west Africa.

bcoates•8mo ago
This article leaves me super unclear on the metallurgical process going on here--you fire gold ore on a bed of glass rubble and the impurities are adsorbed into the ceramic or ???
colechristensen•8mo ago
Yup.

A whole lot of chemistry process is just X dissolves in Y but not in Z, and using that in order to separate and purify.

In this case metal oxides dissolve in glass (sand, which is a silicon oxide, mostly) but gold doesn't A) oxidize under reasonable conditions or B) dissolve in the glass. Sand or glass waste is melted, the not gold dissolves into the molten glass.

KolibriFly•8mo ago
Innovation doesn't just come from empire-scale institutions
goodmunky•8mo ago
Africa is a such a vast and diverse region that “Africans” is nearly meaningless in this context. But you already know that.
snthd•8mo ago
Can this displace the mercury process used by illegal miners?

Reuters - Insight: Amazon rainforest gold mining is poisoning scores of threatened species https://www.reuters.com/business/environment/amazon-rainfore...

latchkey•8mo ago
Cyanide usage is pretty bad too.
AlecSchueler•8mo ago
They had it in medieval Mali but it seems inaccurate to say "Africans" had it even though it might technically be true.
ChuckMcM•8mo ago
Anyone have a link to the paper?
dondakirme•8mo ago
interesting
bargle0•8mo ago
How impure was the gold dust from the chemical supply company?