The hottest Science Substack posts right now

And their main takeaways
Category
Top Science Topics

Train Derailment

The Polymerist • 249 implied HN points • 21 Feb 23
🔬 Science Chemicals Regulation Safety Environment Economy
  1. Train derailments involving hazardous chemicals occur frequently and pose significant risks to communities.
  2. Enforcement of regulations by agencies like the EPA and DOT is crucial for preventing future incidents.
  3. Long-term solutions to reduce these incidents may require shifting towards safer, more sustainable practices in the chemical industry.

A Linear Algebra Trick for Computing Fibonacci Numbers Fast

Confessions of a Code Addict • 158 HN points • 05 Nov 23
🔬 Science Mathematics Computing Algorithms Linear Algebra Complexity
  1. A linear algebra technique can be applied to compute Fibonacci numbers quickly with a logarithmic time complexity.
  2. Efficient algorithms like repeated squaring can compute powers of matrices in logarithmic time, improving performance for Fibonacci number calculations.
  3. A closed form expression using the golden ratio offers a direct method to compute Fibonacci numbers, showing different approaches with varied performance.

Not so fast, Mr. Fourier!

lcamtuf’s thing • 119 HN points • 12 Mar 24
🔬 Science Computing Signal Processing Mathematics Algorithms Engineering
  1. The discrete Fourier transform (DFT) is a crucial algorithm in modern computing, used for tasks like communication, image and audio processing, and data compression.
  2. DFT transforms time-domain waveforms into frequency domain readings, allowing for analysis and manipulation of signals like isolating instruments or applying effects like Auto-Tune in music.
  3. Fast Fourier Transform (FFT) optimizes DFT by reducing the number of necessary calculations, making it more efficient for large-scale applications in computing.

Fun with Serial and Parallel Sum Reductions

CPU fun • 121 implied HN points • 22 Feb 24
🔬 Science Mathematics Parallel Computing Computer Science Algorithms
  1. Floating point arithmetic can be more complex than expected, especially due to limited mantissa bits, affecting the accuracy of calculations.
  2. Complaining about OpenMP reductions giving 'the wrong answer' is misguided; the issue likely existed in the serial code and is now being exposed.
  3. Changing the type of the accumulator to 'double' can help resolve issues with floating point arithmetic and accuracy during sum reductions.
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Making Sense of Consciousness Part 4: States of Consciousness

Rough Diamonds • 13 implied HN points • 08 Aug 25
🔬 Science Neuroscience Psychology Cognition Health Medical
  1. The thalamus plays a big role in different states of consciousness. When it's less active, like during sleep or anesthesia, we are less aware of what's around us.
  2. Disorders of consciousness, like coma or vegetative states, often involve damage to the thalamus. This means the brain doesn't process or respond to the environment, even if the person seems awake.
  3. During deep sleep, the thalamus helps control the brain's electrical activity. It leads the body into slower wave patterns, showing it's crucial for our sleep cycles.

What Links Humans, Hermit Crabs and Possibly Creatures on Mars?

Creating Inequality • 19 implied HN points • 12 Jan 24
🔬 Science Nature Analysis Research Evolution System
  1. Vacancy chains are a way resources are distributed where one person's success leads to success for others too.
  2. Resources distributed through vacancy chains have common abstract qualities, regardless of species or social development.
  3. Vacancy chains are not optional but necessary for groups when resources have specific abstract qualities. These chains may occur even in unknown creatures on other planets like Mars.

Friendship Paradox

Brain Lenses • 19 implied HN points • 11 Jan 24
🔬 Science Psychology Sociology Research
  1. The Friendship Paradox states that your friends likely have more friends than you.
  2. People with a lot of friends are more likely to show up in multiple friend groups.
  3. This phenomenon skews the sample pool when looking at a random person's friend group.

From Ore to Core

Doomberg • 115 implied HN points • 29 Feb 24
🔬 Science Nuclear Energy Physics Technology
  1. This post discusses the importance of nuclear energy as a baseload power source.
  2. The session with physicist James Krellenstein provides insights into the technology and its value chain.
  3. The content is exclusively available for subscribers in the Doomberg Pro plan.

Making Money From Lignin

The Polymerist • 215 implied HN points • 25 Apr 23
🔬 Science Chemistry Biotechnology Materials Enzymes
  1. Lignin can be a valuable source of aromatic structures for creating synthetic polymers and other materials.
  2. MetGen's enzyme-based technology allows for efficient depolymerization and refining of lignin in alkaline conditions.
  3. MetGen's advancements in lignin processing could make it a viable alternative to petroleum-based feedstocks for creating chemicals and materials.

Biases Against Risky Research

New Things Under the Sun • 224 implied HN points • 31 Mar 23
🔬 Science Research Bias Funding Academic
  1. Scientific institutions may be risk-averse and favor safe and incremental projects over transformative ones.
  2. Individual reviewers and averaging peer review scores may bias against high-risk, high-reward research proposals.
  3. In grant review processes, negative feedback tends to be more influential than positive feedback, leading to potential bias against novel research.

Links for Summer 2025

Telescopic Turnip • 17 implied HN points • 02 Jul 25
🔬 Science Biology Psychology Technology Ecology Music
  1. Bacteria can communicate using electrical signals, which might help us treat skin infections by gently convincing them to leave instead of killing them.
  2. A new drug that mimics the wakefulness hormone orexin shows promise for narcolepsy, and could potentially help others reduce their sleep needs.
  3. Research into mimicry and the evolution of bird songs reveals fascinating insights into how animals adapt and communicate over time.

Could we stop Yellowstone from erupting with a giant geothermal power plant?

Construction Physics • 213 HN points • 25 Apr 23
🔬 Science Geothermal Energy Climate Impact
  1. Yellowstone National Park sits on top of a supervolcano that could have catastrophic eruptions
  2. Using a giant geothermal power plant to bleed off heat from the magma chambers could prevent Yellowstone from erupting and generate electricity
  3. Developing such technology could provide benefits beyond just Yellowstone and address a major risk to civilization

Economics and Evolutionary Psychology

David Friedman’s Substack • 143 implied HN points • 29 Nov 23
🔬 Science Psychology Evolution Behavior Economics Biology
  1. Economics predicts individual behavior based on personal goals, while evolutionary psychology focuses on genes' goals for reproductive success.
  2. Evolutionary psychology sees the human mind as specialized modules shaped by Darwinian evolution for survival in hunter-gatherer environments.
  3. Behavioral inconsistencies in economics can be explained by beliefs in 'just prices' influenced by evolutionary psychology and ancestral trading practices.

What is nuclear's should-cost?

Gordian Knot News • 212 implied HN points • 04 May 23
🔬 Science Nuclear Energy Regulation Cost Analysis Risk Assessment
  1. Nuclear power can be more cost-effective than traditional sources like coal plants.
  2. Naive LCOE may not accurately represent the true cost of nuclear energy due to fluctuations in demand and the need for backup.
  3. Key challenges for nuclear power include regulatory risk, construction risk, and ensuring liability for unplanned outages and radiation releases.

Tiling the plane with congruent polygons

A Piece of the Pi: mathematics explained • 18 implied HN points • 29 Jun 25
🔬 Science Mathematics Geometry Physics Logic Education
  1. You can't cover a flat surface with regular pentagons because their angles don't fit together perfectly. The angle of a pentagon is 108°, and it's not a number that evenly divides into 360°.
  2. However, there are other shapes, like certain hexagons and quadrilaterals, that can tile the plane without any gaps. These shapes can fit together nicely to fill space.
  3. Tiling is a fun way to explore patterns and geometry, showing how shapes can interact in creative and mathematical ways. It leads to interesting discoveries in both art and mathematics.

Counting dimer tilings

A Piece of the Pi: mathematics explained • 36 implied HN points • 21 Feb 25
🔬 Science Mathematics Combinatorics Physics Statistics Theory
  1. Dimer tilings involve arranging domino-shaped pieces on grids, and how many ways you can arrange them can vary based on the layout. For example, on a 3x3 grid with one space empty, there are 18 different arrangements.
  2. If at least one dimension of a rectangle is even, it's possible to cover it completely with dimers. However, if both dimensions are odd, it's impossible to cover them without leaving gaps.
  3. There are mathematical patterns and theorems, like Gomory's Theorem, that help understand how to tile grids with dimers. These principles can show when tiling is possible based on the arrangement and color of squares.

Nanopore Fireside Chats

ASeq Newsletter • 14 implied HN points • 29 Jul 25
🔬 Science Biotechnology Research Health Innovation Technology
  1. Fireside chats are popular and provide a relaxed way to discuss important topics. They create a friendly space for engaging conversations.
  2. Device placements for some products may have faced challenges recently. It's worth exploring how these changes affect business and strategy.
  3. The discussion highlighted differing views on the outlook for certain technologies, showcasing the importance of diverse opinions in business discussions.

Cognitive Science needs linguistic diversity

The Counterfactual • 59 implied HN points • 20 Feb 23
🔬 Science Cognitive Science Linguistics Psychology Human behavior
  1. Cognitive science and linguistics are often too focused on English, which means we miss out on understanding how different languages work. Studying only a few languages makes it hard to see the full picture of language and cognition.
  2. Different languages influence how we think and perceive the world. For example, some languages have unique ways of expressing colors or time that can change how speakers of those languages understand these concepts.
  3. To improve our understanding of cognition, researchers need to include a wider variety of languages in their studies. We should explore languages beyond English to get a better grasp on how the human mind works across different cultures.

Microarrays: What are they for?

ASeq Newsletter • 36 implied HN points • 11 Feb 25
🔬 Science Biotechnology Genomics Microbiology Research Methods Market Analysis
  1. Microarrays are often seen as an alternative to sequencing, but some argue sequencing is generally a better option for many applications. It's important to consider these viewpoints when discussing the technologies.
  2. The microarray market is stable, worth around $1 billion, with platforms like Illumina's Beadarray holding a significant share. This indicates that there is still a solid demand for microarray technology.
  3. Reassessing biases about technologies like microarrays can help us understand their current relevance and future potential. It’s always a good idea to keep an open mind when evaluating scientific tools.

Paper Summary: The Koha Code - A Biological Theory of Memory

Sigil • 19 implied HN points • 29 Dec 23
🔬 Science Neuroscience Biology Memory Learning Cognition
  1. The Koha model proposes that dendritic spines are computational units that scan for specific temporal codes in the brain.
  2. Excitatory and inhibitory neurons can form neural circuits that use lateral inhibition to suppress other neurons.
  3. Dendritic spines change shape to amplify or dampen signals, encoding temporal patterns and competing to become the 'winning neuron'.

School of Rock

Street Smart Naturalist: Explorations of the Urban Kind • 99 implied HN points • 25 Aug 22
🔬 Science Biology Ecology Geology Education
  1. Coccolithophores are tiny marine plants that can bloom in huge numbers. These blooms are so big they can be seen from space, turning the water a vibrant color.
  2. Chalk used in schools comes from coccoliths, the remains of these tiny organisms. The famous White Cliffs of Dover are made from billions of these tiny critters that lived millions of years ago.
  3. The shift from chalk and slate blackboards to whiteboards means students might be missing the natural connection to where their materials come from. Using chalk was a way for kids to engage with nature's wonders.

Breakthrough of the Year is JWST

Science Forever • 39 implied HN points • 05 Jan 23
🔬 Science Space NASA Inspiration Coverage
  1. The James Webb Space Telescope (JWST) is Science's Breakthrough of the Year for 2022.
  2. There is an insightful video available related to the coverage of JWST, created by Kevin McClean and Megan Cantwell.
  3. Despite controversy, there is a call to rename the JWST to better reflect inclusivity in space exploration.

Summer Soundscape

Dada Drummer Almanach • 163 implied HN points • 08 Aug 23
🔬 Science Environment Birds Climate change
  1. The soundscape in many neighborhoods has changed due to human activities like construction and climate change.
  2. Scientists have observed a significant decline in the number of insects and birds in certain environments over the years.
  3. The decline in insects has led to a decrease in bird populations as well, affecting ecosystems.

Literature Reviews and Innovation

New Things Under the Sun • 144 implied HN points • 02 Oct 23
🔬 Science Research Policy Innovation Literature Meta-analysis
  1. Literature reviews tend to be more highly cited than traditional research articles in academia and policy.
  2. Literature reviews help consolidate isolated niches of research into more central ideas in academia.
  3. Academic literature reviews can influence policy-making by providing a broader and more accurate picture of scientific findings.

A Hurdle for New Biobased Plastics

The Polymerist • 215 implied HN points • 14 Feb 23
🔬 Science Plastics Chemistry Sustainability Performance
  1. Creating biobased plastics that are both affordable and perform well is a major challenge.
  2. Price, performance, and convincing consumers are the three main hurdles to overcome in promoting biobased plastics.
  3. The success of biobased plastics hinges on their ability to compete with traditional plastics in terms of cost and performance, while also gaining consumer acceptance.

The New Expanded Illustrated Orwelexicon: DSM 666

Unsafe Science • 48 implied HN points • 14 Nov 24
🔬 Science Psychology Academia Sociology Research Bias
  1. The New Expanded Illustrated Orwelexicon introduces new words to highlight biases and issues in psychology and academia. It aims to make these concepts clearer and more accessible.
  2. This resource shows how language can shape our understanding of societal problems. By using specific terms, it helps pinpoint dysfunctions within various fields.
  3. Overall, the Orwelexicon encourages critical thinking about psychology and social science. It invites people to reflect on how words influence perceptions and beliefs.

Cheap nuclear is healthy nuclear

Gordian Knot News • 139 implied HN points • 15 Oct 23
🔬 Science Nuclear Radiation Health Energy
  1. Engineers must balance desirable factors like performance and safety in their work.
  2. Our understanding of numbers and rational thinking is a relatively recent development.
  3. Low levels of radiation exposure from nuclear accidents may not cause measurable harm and nuclear energy can have health benefits compared to fossil fuels.

Holey Moley

Street Smart Naturalist: Explorations of the Urban Kind • 159 implied HN points • 30 Dec 21
🔬 Science Biology Ecology Naturalism Environmental Science
  1. Holes in nature, like those made by bees or woodpeckers, are often overlooked but are important homes for various creatures. These tiny spaces showcase how life adapts to different environments.
  2. Antlion pits are clever traps made by larvae to catch unsuspecting ants. The way they build these pits shows how animals can be both creative and ruthless in finding food.
  3. Saguaro cacti serve as long-term homes for birds, forming unique living spaces called boots. These holes highlight how plants and animals can work together and support each other's lives.