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Planet Labs' open satellite feed
Benchmarks & Tips for Big Data, Hadoop, AWS, Google Cloud, PostgreSQL, Spark, Python & More...
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The latest blog posts to take off on Hacker News. 2,038 posts.
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The Navier–Stokes Millennium Prize Problem
On the Navier–Stokes Millennium Prize Problem introduces an impressive result from OpenAI, who used an unreleased model to produce a resolution to the Navier–Stokes existence and smoothness problem, one of …
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Is mathematics about to enter the conservatory?
Math as cultural institution.
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Icy Moons Are Ocean Worlds
The best ice fishing in the Solar System is worth finding
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Can guitar frets perform multiplication?
I’m sure that some pictures are worth a thousand words, but others trigger a whole lot of puzzlement. Such was the case with the cover of a book I recently bought entitled Calculating with Tones: The Logarithmic Logic of Music:
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Evidence of Fraud in an Influential Study About Procrastination
A new paper in Psychological Science (.htm) reports a failure to replicate Study 2 of Ariely and Wertenbroch’s influential article entitled, “Procrastination, Deadlines, and Performance: Self-Contr…
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Quantifying Colour
A visual description of the CIE 1931 colour spaces.
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Does the Sumerian King List Align with Paleoclimate Events?
A statistical test of whether the Sumerian King List's antediluvian reigns line up with paleoclimate events better than chance.
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The Sloppification of Peptides
Nobody in the comments is real
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Palomar: A registry of Lean verified mathematics
In recent months there has been a proliferation of AI-generated proofs of various old and new results, some of which have been formalized in the proof assistant language Lean. However, checking tha…
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How to put 170 atoms in an atom
You might already know that atoms are mostly empty space. Physical size behaves a bit weirdly at the atomic scale, but essentially the radius of an atom’s nucleus is tens of thousands of times smal…
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Guiding Ships with Moire Patterns (2018)
I was inspired by Tom Scott’s excellent video and links here where he talks about a particular type of “Inogon” light used to guide ships through channels or harbours. The patent …
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The lattice of sets of natural numbers is rich (2021)
$\newcommand\of{\subseteq}\newcommand\N{\mathbb{N}}\newcommand\R{\mathbb{R}}\def\<#1>{\left\langle#1\right\rangle}\newcommand\Z{\mathbb{Z}}\newcommand\Q{\mathbb{Q}}\newcommand\ltomega{{{<}…
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There Are Magic Hexagons of Every Order
What is so special about the number 19?
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The Entropy of a Markov Chain
A more explicit example
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The Grid That Doubles the Strength of the Ground
[Note that this article is a transcript of the video embedded above.] The Port of Long Beach in Southern California is the second-busiest container seaport in the United States, a major gateway for goods flowing to and from the west coast. Together with its next door neighbor, the Port of Los Ange
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Workers Drilling in Romania Broke into a Cave Sealed for 5.5M Years
Almost everything alive on the surface of this planet runs, ultimately, on sunlight. Plants capture light and turn it into sugar. Animals eat the plants.
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Increasing the lifespan of a bulb makes it worse in every other way
This isn't quite right , but it's the type of wrong that cites its sources and hides in the part you'd never think to fact check:
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So you want to use plants to reduce CO₂
You face certain challenges
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Why is everyone trying to build a solid-state battery?
A battery technology that’s getting a lot of attention is solid-state batteries, lithium-ion batteries that replace the liquid electrolyte with a solid material.
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“Gravity is worth asking about”
A blog about software craft and quality
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The Strongest El Niño Ever
With all the July runs in, dynamical models give a ~90% chance of a record-setting event
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How to survive boiling water
A probiotic paradox
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Does creatine make you smarter?
And why does the brain use creatine anyway?
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What's Under Your Feet in New York City?
[Note that this article is a transcript of the video embedded above.] New York City is unlike any other city in the United States. It’s the most densely populated area in the country by far, absolutely packed with buildings, business, homes, and people. But for all that you can see walking the str
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A digestion of the Jacobian conjecture counterexample
The notorious Jacobian conjecture can be formulated concretely over the complex numbers as follows. Conjecture 1 (Jacobian Conjecture) Let $latex {F:{\bf C}^n \rightarrow {\bf C}^n}&fg=000000$ …
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More Bounce to the Ounce
A love letter to the rocket that everyone is too chicken to build
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A metallurgist's doubts about self-replicating probes
Thanks for this. These are the sorts of clearheaded questions that must be asked if discussions of advanced and/or extraterrestrial technologies are to move beyond pleasant speculation and “get real.”
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How to sequence your own DNA at home
I have now sequenced my own genome 5 times with an Oxford Nanopore Technologies MinION. This means collecting them from a swab, prepping them for sequencing, running them through a sequencer, then doing analysis over them.
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Aluminum foil (2021)
It’s typically 10 μm thick and 400 mm wide, giving it an aspect ratio of 40000 in that dimension, and rolls are commonly some ten meters in length, for an aspect ratio of 1 000 000; heavy-duty versions can reach 30 μm or more. Despite their thinness, foils of 25 μm or more are impermeable to oxygen, water, and light…