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The 8000th Busy Beaver number eludes ZF set theory (2016)
I’ve supervised a lot of great student projects in my nine years at MIT, but my inner nerdy teenager has never been as personally delighted by a project as it is right now. To…
New
The latest blog posts to take off on Hacker News. 409 posts.
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US Should Create Strategy by End of '22 to Reduce Increasing Ocean Plastic Waste
Reckoning with the U.S Role in Global Ocean Plastic Waste concludes plastic waste in the U.S. is ubiquitous and increasing. Worldwide, at least 8.8 million metric tons of plastic waste enter the world’s oceans each year — the equivalent of dumping a garbage truck of plastic into the ocean every minute — and in 2016…
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Study links high cholesterol, cardiovascular disease to plastics
UC Riverside-led mouse study finds a receptor greatly contributes to the harmful effects of plastic-associated chemicals
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Researchers shrink camera to the size of a salt grain
Researchers at Princeton University and the University of Washington have developed an ultracompact camera the size of a coarse grain of salt. The new system can produce crisp, full-color images on par with a conventional compound camera lens 500,000 times larger in volume.
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New cancer therapy holds potential to switch off major cancer types
In mice and in human tissue, a new compound discovered at Princeton disables a key gene that’s implicated in breast, prostate, liver, lung, colon and other cancers.
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Arctic Ocean started getting warmer decades earlier than we thought
The Arctic Ocean has been getting warmer since the beginning of the 20th century – decades earlier than records suggest – due to warmer water flowing into the delicate polar ecosystem from the Atlantic Ocean.
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Ph.D student demonstrates a single, working laser on silicon
Engineering physics PhD student Khadijeh Miarabbas Kiani has fabricated a laser on silicon using a simple, cost-effective method - something that has been a longstanding challenge in the field of silicon photonics. [...]Read More...
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Is watching the 1984 Ghostbusters movie killing people?
Is watching the 1984 Ghostbusters movie killing people? English adults under 60 who have watched the 1984 Ghostbusters movie are dying at twice the rate of people who have watched the 2021 Ghostbusters move the same age.And have been for six months. The chart may seem unbelievable or impossible but it is correct…
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Importance of muscle mass, strength and cardiorespiratory fitness for longevity
"If you have the aspiration of kicking ass when you're 85, you can't afford to be average when you're 50." —Peter Attia
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Omicron Update: Nov 27
There is a lot of anxiety.
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The Entire History of Soviet Rocket Engines
Soviet rocket engines - this article is about their history, their development, their use and their rockets.
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New Concerning Variant: B.1.1.529
I hope everyone in the States had a fantastic Thanksgiving (even if you’re a Dallas Cowboys football fan).
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Is my cat Turing-complete?
This article is an adaptation of a Lightning Talk I gave at CppCon2021. Link here : https://www.youtube.com/watch?v=RtqTGSOdmBo
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How death rates from Covid-19 differ between vaccinated and unvaccinated
To understand how the pandemic is evolving, it’s crucial to know how death rates from COVID-19 are affected by vaccination status.
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Science upside for Starship
This blog is a direct follow up of Starship Is Still Not Understood, and is part of the series on popular misconceptions in space journalism. Now available in audio form. I think it is relatively s…
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Plunge in lithium-ion battery costs
The cost of lithium-ion batteries for phones, laptops, and cars has plunged over the years, and an MIT study shows just how dramatic that drop has been. The change is akin to that of solar and wind energy, and further declines may yet be possible, the researchers say.
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‘Dancing molecules’ successfully repair severe spinal cord injuries
Researchers have developed an injectable therapy based on nanofibers that has enabled paralyzed mice with severe spinal cord injuries to regain the ability to walk.
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Explanations for the Havana Syndrome
Science News, Physics, Science, Philosophy, Philosophy of Science
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Dopamine Fasting: A Maladaptive Fad (2020)
Dopamine is a neurotransmitter involved in the body’s system for reward and pleasure. A recent trend has people avoiding stimulating activities in the belief that doing so allows the body to rese...
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An Introduction to Lagrange Multipliers
Lagrange multipliers are used in multivariable calculus to find maxima and minima of a function subject to constraints (like "find the highest elevation along the given path" or "minimize the cost of materials for a box enclosing a given volume"). It's a useful technique, but all too often it is poorly taught and…
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Ultracold, superdense atoms become invisible
MIT physicists have confirmed that as atoms are chilled and squeezed to extremes, their ability to scatter light is suppressed, making them less visible. The findings show the Pauli exclusion principle, or Pauli blocking, applies not just to electrons but also to atoms.
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The Greedy Doctor Problem
TL;DR: How to reason about people who are smarter than you. A few proposals, interspersed with reinforcement learning and humorous fiction. Ending on a surprising connection to logical inductors.
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Palm oil favors tumor expansion
Ninety per cent of cancer deaths are caused by metastasis, that is to say, the spread of the primary tumour to other organs. Scientists led by ICREA researcher Dr. Salvador Aznar-Benitah at IRB Barcelona have described the mechanism by which a diet rich in palmitic acid makes tumour cells more aggressive, conferring…
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Biomarker predicts severity of Covid-19 infection early on
High expression of the fitness gene hFwe-Lose in the lung reliably predicts severe progression
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How to grow sodium chloride crystals at home
After trying for 3 years, I found a way to grow transparent, high quality sodium chloride crystals at home. Here's my procedure.
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