Spencer (@sqburl) header
Spencer (@sqburl) profile picture

Building what excites me. Previously: ran a house factory @rentthebackyard YC S19, @CarnegieMellon

Joined July 2012
Photo by Spencer (@sqburl)Photo by Spencer (@sqburl)Photo by Spencer (@sqburl)Photo by Spencer (@sqburl)Photo by Spencer (@sqburl)Photo by Spencer (@sqburl)Photo by Spencer (@sqburl)Photo by Spencer (@sqburl)Photo by Spencer (@sqburl)Photo by Spencer (@sqburl)
in 1970, the USSR had 270 million people while the US had only 205 million people in 2025, Russia has 143 million people while the US has 340 million
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Announcing Primateria, an AI-native scientific lab. We’re starting with one of the hardest problems in quantum mechanics: the electronic Schrödinger equation. Our first model tackles it in transition metals, a notoriously difficult regime. Try it: app.primateria.com/
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we like to think national parks measure natural beauty. but they also measure where americans live and how far they’re willing to drive.
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mine landfills wen?
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foreign born prisoners are overrepresented in France, Germany, Italy and Norway but underrepresented in the US, UK, Australia, and Sweden sometimes the most interesting thing about a dataset is how little it tells you
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almost half of German electricity is wind and solar. but it chose to retire nuclear before coal their "Energiewende" (energy transition) is in full swing, but they could have been almost carbon free by now
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the gas (understated since this Is just for electricity): >55% came from Russia until they invaded Ukraine in 2022
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I didn't realize H1Bs were so Indian skewed (and have been for 10+ years). There's an ~85k / year cap on new H1Bs but If you want to get an employer sponsored green card (EB2/3) there's a nationality cap and wait: ~2 years for most 5 years for Chinese 134 years for Indians
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TIL: ~94% of Chinese population lives on ~43% of its land an area the size of the entire EU, as dense as Japan
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the west of this "Hu line" is the same density as Utah
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how'd Colorado end up the third highest college degree earning state?
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TIL: New Mexico, Arizona, Colorado, and Nevada have some of the most outdoor-friendly climates in the US.
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also wow I didn't realize Texas had so much variation
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Many of the world's largest islands seem clustered in the Arctic and Indonesian archipelago Both were once continuous landmasses born from ice. The Arctic was carved apart by glaciers over millions of years. Indonesia's Sunda Shelf flooded when that same ice melted, isolating its volcanoes and mountains into islands. One archipelago frozen into being. The other, melted into existence.
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also wow 42,000x difference in population density: Java: 150m people on 54k sq miles (~Pennsylvania) Greenland: 56k people on 836k sq miles (3x Texas)
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Papua New Guinea's 10 million people speak 840 languages (12% of the world's total!) Sliced by mountains, valleys, and no navigable rivers, the island of New Guinea (shared with Indonesia) has long existed as a group of separate worlds only a few miles apart. Even today, the primary languge tok pisin (an English creole) is only just starting to reach into the jungle.
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we've gotten better at growing soybeans and wheat, but much much better at growing corn
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will there ever be another tv finale as big as Seinfeld, Friends, or MASH?
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