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Synthetic diamonds are now purer, more beautiful, and vastly cheaper than mined diamonds.

Low birth rates may be bad rather than good news for our ability to deal with climate change.

In the nineteenth century, the societies of Europe and North America were profoundly transformed by the vast railway networks they built. When these railway networks entered cities, however, they faced a crucial problem: they had to stop.

When FDA standards for drug safety and efficacy became stricter in the 1960s, drug developers almost abandoned rare diseases due to regulator unfamiliarity and low revenue potential.

1760: 🇫🇷25 million people 🏴󠁧󠁢󠁥󠁮󠁧󠁿5.5 million 2025 🇫🇷68 million 🏴󠁧󠁢󠁥󠁮󠁧󠁿56 million If France’s population growth had kept pace with England’s, there would be 250 million Frenchmen and another 320 million abroad. What happened? 🧵 www.worksinprogress.news/p/570-millio...

There exists a popular sentiment that we can’t build as well as we used to and our best days are behind us. But when we choose to, we can still build beautiful and interesting developments. Here’s a tour of 10 new projects that are creating a better built environment. 🧵

Planes aren’t getting faster. Buildings in the developed world aren’t getting taller. Roads are getting slower. But the world’s largest passenger ship record has been broken 9 times this century. They show what is possible w/o the constraints that stifle progress on dry land. 🧵

We can still build great things, at least in some places. Here’s a run down of 10 major new infrastructure projects that have happened recently.

Madrid’s metro was 71 miles long in 1995. That would be the world’s 51st longest today, reasonable considering Madrid is the 57th largest city by population. Yet over 12 years, the metro would ~3x in length at costs much lower than was thought possible. Here’s how they did it. 🧵

Very informative article about how animals were and are used as chemical factories. Lots of stuff in there I had never heard of! I’m in awe of the people who discovered all of this, but even more so of modern biotechnology offering synthetic alternatives. worksinprogress.co/issue/animal...

really great read on how Madrid (and Spain by large) have some of the cost-effective transit constructions in the world worksinprogress.co/issue/how-ma...

good piece on how Madrid built out a massive metro expansion for like 1/20th of what it costs in NYC worksinprogress.co/issue/how-ma...

“Every year, over 700,000 horseshoe crabs are caught and bled. The global vaccine industry uses an estimated 600 million chicken eggs a year to produce influenza vaccines. And we boil between 420 billion and 1 trillion silkworms every year to produce silk.” Could we replace them with synthetic bio?

This is a great article that gets at another reason why blue cities have such terrible homelessness issues. Housed relatives and friends do not have the space to lend to displaced friends and family like they would in cheaper markets, making people homeless. worksinprogress.co/issue/why-ho...

A new piece by Salim Furth makes important points on the relationships between homelessness and housing supply, which is more complicated than some analyses suggest: worksinprogress.co/issue/why-ho...

Over the last century, milk productivity by the average U.S. dairy cow has risen 6-fold! Full story worksinprogress.co/issue/how-bi... 🧪

Bsky folks and #EconSky, The cool people at @worksinprogress.bsky.social invited me to write an article for their December issue about the fascinating story of innovation in US dairy genetics. Roughly based on some of my research in this area. My highlights: worksinprogress.co/issue/how-bi...

It’s widely accepted *that* less expensive housing markets see less homelessness, but this important piece shows *why*: family & friends have more space to spare worksinprogress.co/issue/why-ho...

Our latest issue is now out! - Animals as chemical factories - How housing shortages cause homelessness - Where the glamour of progress went - How big data created the modern dairy cow - Urbanist cruise ships - Functionalism - How Madrid built its Metro

Geothermal contributed only 0.35% of global energy production in 2020. But 0.005% of Earth’s heat could power humanity for a million years. How can we harness this nearly unlimited heat source and what are the new technology developments? 🧵

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