The hottest Science Substack posts right now

And their main takeaways
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Top Science Topics

The Kessler Syndrome Edition

Why is this interesting? ā€¢ 1025 implied HN points ā€¢ 05 Aug 25
šŸ”¬ Science Space Environment Technology Safety Policy
  1. Kessler Syndrome describes a dangerous situation in space where more satellites lead to more collisions, creating even more debris. This can make it hard for any spacecraft to safely operate in orbit.
  2. Right now, there are millions of pieces of space junk, but we can only track about 40% of them. A small piece, like a paint chip, can be extremely dangerous to spacecraft traveling at high speeds.
  3. The current methods for avoiding collisions in space are very outdated. Satellite operators often have to rely on email to communicate about potential dangers, which isn't very effective.

The Shallowness of Garett Jonesā€™ Immigration Research

Heterodox STEM ā€¢ 298 implied HN points ā€¢ 30 Nov 25
šŸ”¬ Science Social Science Economics Migration Research Methods Institutions Culture Political Economy
  1. A major critique is that some immigration research adds little original empirical or theoretical insight and omits important peerā€‘reviewed studies that directly bear on its claims.
  2. The common measure of "generalized social trust" used to link trust and economic growth is argued to be flawed ā€” problems include questionable survey validity, weak prediction of real trusting behavior, sample bias, omitted variables, and a lack of incorporation into formal growth models; when addressed, the purported trustā€“growth relationship can vanish.
  3. Scholarly disputes are criticized for relying on vague accusations, deleted public comments, and a failure to make specific, formal challenges to peers or journal editors, highlighting a need for clearer, evidenceā€‘based engagement.

Animalcules and Their Motors

Asimov Press ā€¢ 399 implied HN points ā€¢ 13 Nov 25
šŸ”¬ Science Biology Microbiology Evolution Cell Biology
  1. Scientists have made big improvements in cryo-electron microscopy, which helps them see how tiny microbes move by looking at their flagella, or tails. This technique allows researchers to understand the complex structure of these microscopic motors.
  2. Different bacteria have unique adaptations in their flagella to fit their environments. For instance, some microbes can spin their flagella incredibly fast to swim in water, while others, like those in the human gut, have stronger motors to move through thick fluids.
  3. The flagellum is a remarkable molecular machine that assembles itself from many proteins. It works by using protons flowing across the cell membrane, which creates the energy needed to make it spin and help the cell move.

Statistical modeling seen through inductive biases

Mindful Modeler ā€¢ 419 implied HN points ā€¢ 28 May 24
šŸ”¬ Science Statistics Modeling Machine Learning
  1. Statistical modeling involves modeling distributions and assuming relationships between features and the target with a few interpretable parameters.
  2. Distributions shape the hypothesis space by restricting the range of models compatible with specific distributions like a zero-inflated Poisson distribution.
  3. Parameterization in statistical modeling simplifies estimation, interpretation, and inference of model parameters by making them more interpretable and allowing for confidence intervals.

Flight Of The Ultimate Navigator

Everything Is Amazing ā€¢ 1194 implied HN points ā€¢ 24 Jul 25
šŸ”¬ Science Biology Migration Animals Ecology Environment
  1. Arctic terns are amazing birds that fly incredible distances. In a year, they can cover around 59,650 miles, which is like going to the Moon and back several times.
  2. These birds have a natural instinct for navigation. They rely on the sun, stars, and Earth's magnetic field to find their way, even without any training.
  3. To prepare for their long migrations, Arctic terns and other migratory birds change their bodies to store fat and energy needed for the journey. They can drop weight as they travel to fuel their flights.
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Things I Like About Geology

Street Smart Naturalist: Explorations of the Urban Kind ā€¢ 439 implied HN points ā€¢ 23 May 24
šŸ”¬ Science Geology Earth Science Paleontology Natural History Environmental Science
  1. Geology shows us that a lot of Earth's history is missing in the rocks we see. For example, not all ancient events are recorded, which creates a unique beauty in how landscapes look today.
  2. The constant fight between uplift and erosion shapes our mountains. Mountains grow tall, but erosion, through water and wind, continuously wears them down, making them more interesting.
  3. Geology helps us understand deep time but also captures small moments in history. Trace fossils show us detailed actions of past life, connecting us to individual stories from millions of years ago.

What aphantasia can teach us about episodic memory

The Memory Palace ā€¢ 39 implied HN points ā€¢ 03 Sep 24
šŸ”¬ Science Cognitive Science Neuroscience Psychology Memory Philosophy
  1. Aphantasia is a condition where people can't create mental images, making it hard for them to recall personal memories. They might not feel like they're reliving past events like others do.
  2. Research shows that people with aphantasia can still remember facts and details, but they use different strategies. They rely more on their understanding and experiences rather than visualizing things.
  3. Aphantasia challenges our notion of memory. It suggests that memory isn't just about visual details; it includes feelings and experiences too, which can be important for how we recall our past.

Element High-throughput: Vitari

ASeq Newsletter ā€¢ 29 implied HN points ā€¢ 20 Feb 26
šŸ”¬ Science Genomics Sequencing Biotechnology Life Sciences
  1. A new high-throughput sequencer delivers up to 5 billion reads per flowcell, running 2x150bp in about 36 hours with a planned upgrade to 2x300bp in the future.
  2. It targets a $100 per-genome consumable cost while the instrument is priced at $689,000, putting it cheaper per genome than some competitors but more expensive than others.
  3. The system is compact (mini-fridge size) and uses two flowcells with six lanes each, positioning it as a solid alternative to existing high-throughput platforms.

AI in the Age of Mythic Powers by Josh Schrei

The Bigger Picture ā€¢ 858 implied HN points ā€¢ 14 Mar 24
šŸ”¬ Science AI Mythology Ethics Mystery Society
  1. AI's powers are seen as mythic and magical in scope, with abilities akin to those discussed in ancient stories and magical grimoires.
  2. The discussion around AI goes beyond rationality and delves into religious and spiritual questions, questioning concepts like sentience and consciousness.
  3. AI poses risks not just on a global and societal scale, but also on individual bodies, with potential impacts on embodiment, agency, and mental health.

ROADRUNNER, ROADRUNNER

Entering The Lung ā€¢ 2319 implied HN points ā€¢ 23 Mar 23
šŸ”¬ Science Animals Nature
  1. Author shares a personal story about encountering a roadrunner for the first time in New Mexico.
  2. Seeing a creature in real life for the first time can be a powerful and memorable experience.
  3. Roadrunners have unique behaviors, like eating large snakes and posing for photos.

Surfaces and sequence graphs

A Piece of the Pi: mathematics explained ā€¢ 66 implied HN points ā€¢ 31 Jan 26
šŸ”¬ Science Mathematics Topology Geometry Graph Theory Number Theory
  1. You can build a graph by placing n vertices in a cycle and linking them according to the rank order of the first n terms of a real sequence, and as n grows these sequence graphs reveal striking geometric patterns.
  2. Graphs coming from the Kronecker sequence (multiples of the golden ratio mod 1) can be drawn on a torus without crossings, typically after removing the edge from nāˆ’1 to 0.
  3. Graphs from the van der Corput sequence embed into the Chamanara surface ā€” a highly singular, infiniteā€‘handle (ā€œLoch Ness monsterā€) surface made by identifying shrinking boundary segments of a square ā€” and finite approximations avoid the worst singularities so they can be visualized.

Neil DeGrasse Tyson's Precipitous fall from the Heavens

An Insult to Intuition ā€¢ 2181 implied HN points ā€¢ 30 Apr 23
šŸ”¬ Science Astrophysics Vaccines Consensus Research
  1. Neil DeGrasse Tyson's credibility as a scientist is being questioned by the public.
  2. The divide between groups with differing beliefs is growing, causing a lack of understanding and communication.
  3. Experts, even in fields like astrophysics, should be cautious and diligent when speaking on topics outside their expertise.

Evolution Explains Polygenic Structure

Astral Codex Ten ā€¢ 8465 implied HN points ā€¢ 08 Feb 24
šŸ”¬ Science Evolution Genetics Mental health Research
  1. Genes for severe conditions like schizophrenia are likely small in effect and numerous, not large and few.
  2. Evolution would have eliminated genes with large negative effects, leaving only genes with small effects.
  3. The presence of genes with very small effects may be due to various factors like insufficient time for removal or counterbalancing advantages.

What Makes Men and Women Different?

Uncharted Territories ā€¢ 2162 implied HN points ā€¢ 04 Sep 23
šŸ”¬ Science Evolution Gender Physiology Psychology Sexuality
  1. Women and men think differently due to biological differences like having a uterus, leading to significant psychological variations.
  2. Men and women face different stakes in relationships and reproduction, with women having higher commitments and limitations due to their reproductive capacity.
  3. Evolutionary factors have shaped men to compete for access to females, leading to traits like dominance, aggression, physical strength, and risk-taking behavior.

Resisting the Politicization of Science

Heterodox STEM ā€¢ 199 implied HN points ā€¢ 14 Dec 25
šŸ”¬ Science Research Integrity Academic Freedom Science Policy Publishing Peer Review Higher education
  1. Science must stay independent from politics and ideology, with research, publication, and recognition judged by scientific merit rather than identity or political alignment.
  2. Threats to scientific independence come from multiple directionsā€”both activist pressures within academia and political or governmental interference can undermine research integrity.
  3. Researchers and institutions should defend norms like rigorous peer review, open inquiry, unbiased evaluation, and autonomy in funding and education to preserve scienceā€™s reliability and universality.

The origins of power dynamics, or why chimps can't play baseball

The Garden of Forking Paths ā€¢ 2122 implied HN points ā€¢ 05 Jul 23
šŸ”¬ Science Evolution Biology Psychology Anthropology Human behavior
  1. Humans can throw objects accurately and at high speeds, shaping our modern power dynamics in society.
  2. Our unique shoulder adaptations allow for precise and fast throwing, giving us a competitive advantage over other species.
  3. The ability to use ranged weapons and throw projectiles from a distance has influenced human social structures and power dynamics.

The Right-Hand Rule for Radiation

Fields & Energy ā€¢ 499 implied HN points ā€¢ 29 Apr 24
šŸ”¬ Science Physics Electromagnetism Energy Radiation Research
  1. The right-hand rule for radiation helps us understand how electromagnetic energy behaves. It's a simple concept that suggests the direction of radiation can be figured out using your right hand.
  2. Radiation doesn't just come from single charges; it comes from interactions between charges. If a charge is isolated, it doesn't radiate any energy on its own.
  3. Understanding the difference between fields and energy in electromagnetism is important. They work together but behave differently, and grasping this can help us solve complex problems in physics.

When The Mind Outlasts the Brain

The Ruffian ā€¢ 215 implied HN points ā€¢ 13 Dec 25
šŸ”¬ Science Neuroscience Cognitive Science Aging Brain health Alzheimer's
  1. Alzheimer's causes clear physical brain damage like amyloid plaques, tangled neurons, and brain shrinkage.
  2. The amount of physical damage doesn't line up neatly with thinking ability ā€” some people have heavy pathology but few cognitive symptoms.
  3. The concept of "cognitive reserve" is used to explain this mismatch, suggesting that life experience or mental habits can build resilience so the mind outlasts the brain.

Syndex Bio/Ultima

ASeq Newsletter ā€¢ 21 implied HN points ā€¢ 24 Feb 26
šŸ”¬ Science Genomics Biotechnology Sequencing Diagnostics Oncology Instrumentation
  1. Syndex Bioā€™s mcPCR can copy both DNA sequence and methylation marks during amplification, effectively enabling ā€˜PCR for methylationā€™. This should improve testing of small or nonā€‘invasive oncology samples for earlier detection and recurrence monitoring.
  2. Ultima Genomics launched a cheaper (~$850K) second instrument (ug200) that removes a separate ePCR step and doubles output per wafer, boosting throughput and lowering cost. It still appears beadā€‘based on unpatterned wafers, which suggests thereā€™s further density headroom if they optimize wafer/flowcell design.
  3. The bigger risk for Ultima is commercial: they need to find enough customers to absorb the massive throughput and drive the hyperā€‘elastic growth required for the business to survive. Capacity and performance may be strong, but market adoption is the key bottleneck.

Hereditarian Hypotheses Aren't More Harmful

ideassleepfuriously ā€¢ 1238 implied HN points ā€¢ 11 Jan 24
šŸ”¬ Science Genetics Bioethics Technology Research Health
  1. The blank slate perspective can lead to conflict, totalitarianism, and rejection of genetic enhancement technology.
  2. We should value understanding the role of genes in socioeconomic outcomes for accurate policy-making.
  3. Attributing group disparities to genes can reduce blame, control, and punishment, fostering compassion and reducing social conflict.

DNA And Protein Sequencing Companies

ASeq Newsletter ā€¢ 58 implied HN points ā€¢ 02 Feb 26
šŸ”¬ Science Genomics Proteomics Biotechnology Molecular Biology Bioinformatics Instrumentation
  1. Protein sequencing is becoming a growing startup space, with many companies now working to make protein readouts practical.
  2. Two main technical routes dominateā€”optical methods and nanopore-based sequencingā€”while a smaller set of firms pursue other novel approaches, and multiple companies are active in each category.
  3. An updated directory of DNA sequencing companies is maintained, and contributors are invited to share additional firms to keep the list current.

Can you only talk to people within X IQ of your own?

Just Emil Kirkegaard Things ā€¢ 1100 implied HN points ā€¢ 26 Jan 24
šŸ”¬ Science IQ Communication Leadership
  1. The idea of a communication range suggests people find it hard to bond with those beyond a certain IQ difference.
  2. Evidence supporting this claim is weak and mostly anecdotal, lacking concrete data.
  3. People tend to cluster with others similar in intelligence, a phenomenon known as social homophily, which can affect relationships and social bonds.

Why Are We So Excited About Roche?

ASeq Newsletter ā€¢ 21 implied HN points ā€¢ 23 Feb 26
šŸ”¬ Science Genomics Biotechnology Sequencing Instrumentation Bioinformatics Biotech industry
  1. Rocheā€™s new Axelios single-molecule sequencer appears to be a real engineering breakthrough that can match or beat Illumina on key metrics like read length, speed, throughput, and accuracy.
  2. Because Roche is large, well-funded, and running global pilots, it can aggressively compete on price and scale, potentially grabbing significant market share if reuse and pricing work out.
  3. Significant uncertainty remains due to Rocheā€™s mixed history, pricing and purchasing-cycle risks, and execution challenges, so excellent technology doesnā€™t guarantee immediate market disruption.

A slightly tipsy investigation into my wife's superpower

Experimental History ā€¢ 7657 implied HN points ā€¢ 13 Feb 24
šŸ”¬ Science Research Psychology Education Culture Health
  1. Some people have unique sensory abilities that others may not understand or share, like detecting the lingering smell of eggs on plates even after washing.
  2. Being open-minded and receptive to new ideas is important to avoid rigidity in thinking and to continuously learn and grow.
  3. Academic professions, like journal publishing and university rankings, can sometimes involve questionable practices that prioritize profit over knowledge or ethics.

ā€œFocus like a laser on merit!ā€

Unsafe Science ā€¢ 97 implied HN points ā€¢ 10 Jan 26
šŸ”¬ Science Social Science Psychology Research Methods Science communication Academia Public Policy
  1. Claims about widespread unconscious bias and pervasive antiā€‘female hiring discrimination are often overstated; measures like the IAT tap associations in memory rather than proven unconscious prejudice and do not reliably predict discriminatory behavior.
  2. Many DEI and antiā€‘bias trainings lack solid evidence that they change realā€‘world behavior and can have unintended costs or even provoke reverse bias, so interventions should be rigorously evaluated for both benefits and harms.
  3. The best practical approach is to focus like a laser on merit by using clear, jobā€‘relevant criteria and individualized evidence, and to improve credibility through adversarial collaboration and honest communication about uncertainty.

The Economy of Knowing

The Good Science Project ā€¢ 167 implied HN points ā€¢ 23 Dec 25
šŸ”¬ Science Metascience Science Policy Research Funding Academic culture Peer Review Research Methods Epistemology
  1. Metascience needs a clear micro vs. macro distinction: micro focuses on individual scientistsā€™ beliefs, trust, and behaviors, while macro covers institutions, funding, and governance.
  2. Reforms often fail when they operate at only one level because individuals respond to incentives in predictable ways, producing unintended outcomes like gaming rules or selfā€‘censoring risky work.
  3. Fixing science requires a fullā€‘stack approach that designs policies to change both institutional incentives and the everyday experience of researchers, accounting for the feedback loops between the two.

What are behavioural polygenic scores for?

Wyclif's Dust ā€¢ 1073 implied HN points ā€¢ 02 Jul 25
šŸ”¬ Science Genetics Behavioral Science Statistical Analysis Causality Population Studies
  1. Behavioural polygenic scores (PGS) can show how genetic variation affects important life outcomes. It's key that these effects are meaningful for understanding social issues.
  2. Understanding causal relationships is essential when using PGS. We need to know if the genes influence outcomes or just correlate with them.
  3. Successful use of PGS requires good research design. Researchers should be clear about what they're measuring and ensure that genetic factors are compared to other variables correctly.

RKUL: Time Well Spent, 11/27/2025

Razib Khan's Unsupervised Learning ā€¢ 234 implied HN points ā€¢ 28 Nov 25
šŸ”¬ Science Genetics Biology Public Health Evolution Medicine
  1. Your time is valuable, so it's better to spend it on meaningful activities instead of wasting it online. Books and knowledge can greatly enrich your life.
  2. James Watson made significant contributions to understanding DNA, and his book 'The Double Helix' gives a unique insight into this scientific journey. It's a great read for anyone interested in genetics.
  3. E. O. Wilson and W. D. Hamilton had different approaches to biology, but both made important discoveries. Their works show the evolution of thought in the field of genetics and how science can help us understand life better.

"Oliver Heaviside. An Appreciation : The Personal Equation : The Work of a Genius Elucidated"

Fields & Energy ā€¢ 279 implied HN points ā€¢ 10 Jun 24
šŸ”¬ Science Physics Engineering Mathematics History Biography
  1. Oliver Heaviside was a genius who contributed greatly to electrical science but was often misunderstood and neglected during his life. His work wasn't acknowledged until long after he had passed away.
  2. Heaviside developed important theories on cable signaling and electromagnetic waves, introducing many key terms that are still used today. His insights helped improve how signals could be transmitted over long distances, which was crucial for communication.
  3. Despite his brilliance, Heaviside lived a reclusive life and struggled financially. He preferred to work alone and only began to receive recognition later in life, which made him a complex figure in the world of science.

A Most Important Mustard

Asimov Press ā€¢ 264 implied HN points ā€¢ 26 Nov 25
šŸ”¬ Science Botany Genetics Research Laboratory
  1. Arabidopsis thaliana is a small plant that was first discovered in the Harz Mountains of Germany. Despite its simplicity, it has become a major model for plant biology.
  2. Important researchers saw its potential, especially because it has a small genome and can be easily manipulated in the lab. This made it useful for studying plant genetics.
  3. Over time, Arabidopsis has transformed from being overlooked to becoming a key species for understanding many plant processes, benefiting both research and agriculture.

Chernobyl: the perfect experiment

Gordian Knot News ā€¢ 292 implied HN points ā€¢ 19 Nov 25
šŸ”¬ Science Nuclear Radiation Public Health Environmental Impact Energy Policy
  1. Nuclear accidents like Three Mile Island, Fukushima, and Chernobyl have had surprisingly low impact on public health. Even major releases didnā€™t lead to noticeable increases in cancer rates.
  2. The Chernobyl disaster, despite being severe, mostly harmed individuals who drank contaminated milk. Proper safety measures could have prevented most of the harm caused.
  3. The real danger lies in making nuclear energy too expensive, which can indirectly lead to more deaths by making people poorer. We need to make nuclear cheaper to avoid unnecessary risks.

Cantor Normal Form

Infinitely More ā€¢ 23 implied HN points ā€¢ 12 Feb 26
šŸ”¬ Science Mathematics Set Theory Foundations
  1. Cantor normal form gives every ordinal a unique, canonical representation, acting like a numeral system built on base Ļ‰ instead of base ten.
  2. The notation is as powerful and convenient for working with ordinals as the decimal system is for ordinary numbers, so it makes representing and comparing ordinals systematic and clear.
  3. Using Cantor normal form simplifies ordinal arithmetic because many terms cancel or "disappear," and it provides a foundation for further topics like the surreal numbers.

Clean Water For Everyone?

Everything Is Amazing ā€¢ 1031 implied HN points ā€¢ 11 Jul 25
šŸ”¬ Science Environmental Science Technology Innovation Water resources Engineering
  1. A new type of aerogel can purify seawater using only sunlight. This means it could help provide clean water in areas that really need it.
  2. There is a huge problem with water scarcity around the world, and most of Earth's water isnā€™t drinkable. This breakthrough could change that by making desalination cheaper and more accessible.
  3. The process of using this aerogel might create waste, but thereā€™s potential for that waste to be used in making batteries. This could solve multiple problems at once.

Desperately Seeking Solar Storms

Street Smart Naturalist: Explorations of the Urban Kind ā€¢ 379 implied HN points ā€¢ 16 May 24
šŸ”¬ Science Astronomy Environmental awareness Public Engagement
  1. The excitement of viewing natural events like the Aurora Borealis brings people together, showing a shared interest in nature. It's nice to see so many others wanting to connect with the beauty around them.
  2. Sometimes you might not see what you expect, like missing the Northern Lights, but there's still beauty in simply being outside and enjoying the night sky.
  3. Experiences in nature, like camping or watching the stars, can create lasting memories and inspire a continued appreciation for the universe.