The latest blog posts to take off on Hacker News. 2,038 posts.
Air pollution is a very big deal. Its adverse effects on numerous health outcomes and general mortality are widely documented . However, our understanding of its cognitive costs is more recent and those costs are almost certainly still significantly under-emphasized. For example, cognitive effects are not mentioned in…
Meet the Most Interesting Tunnel Boring Machines
If cement weren't 10,000 years old, it would seem like a futuristic technology: liquid rock!
Peter Denton, Stephen Parke, Xining Zhang, and I have just uploaded to the arXiv the short unpublished note “Eigenvectors from eigenvalues”. This note gives two proofs of a general eige…
Xoilac TV trực tiếp bóng đá HD hàng đầu Việt Nam, đường truyền ổn định, đa dạng link trực tuyến, đa dạng giải đấu, BLV chuyên môn cao và hoàn toàn miễn phí.
I. The Body Keeps The Score is a book about post-traumatic stress disorder. The author, Bessel van der Kolk, helped discover the condition and lobby for its inclusion in the DSM, and the brief fora…
During the early days of testing for the legendary SR-71 Blackbird there were some harrowing mishaps, the details of which have rarely come to light. On January 25, 1966, test pilot Bill Weaver and Lockheed flight test reconnaissance and navigation systems specialist Jim Zwayer experienced their plane vanishing around…
France’s nuclear energy spending was 60% of what Germany spent on renewables. France gets about 400 Terawatt hour per year from nuclear but Germany gets 226 Terawatt-hours each year. 45 Terawatt-hours of Germany’s renewable power comes from burning biomass which generates air pollution.
The National Organic Program (NOP) is now allowing the cancer-causing herbicide, glyphosate, in “organic” hydroponic production.
Part of my series countering misconceptions in space journalism. Now available in audio form. Starlink, SpaceX’s plan to serve internet via tens of thousands of satellites, is a staple in the…
Science News, Physics, Science, Philosophy, Philosophy of Science
Part of my series on common misconceptions in space journalism. Now available in audio form. SpaceX has been working on some variant of the Big Falcon Rocket for almost a decade, with a publicly an…
How can you be in two places at once When you’re not anywhere at all — Firesign Theater [Note: this is NOT original research. I just read the right book] The famous double slit experime…
Some weeks ago I got involved in a discussion on Twitter about, which books to recommend on the history of calculus. Somebody chimed in that Steven Strogatz’s new book would tell you all that you n…
[Related to: Relaxed Beliefs Under Psychedelics And The Anarchic Brain, HPPD And The Specter Of Permanent Side Effects] I. Hallucinogen persisting perceptual disorder is a condition where people wh…
Links:Google paper in NatureNew York Times articleIBM paper and blog post responding to Google’s announcementBoaz Barak’s new post: “Boaz’s inferior classical inferiority FA…
I have a confession to make: I have always found symbolic algebra more intuitive than geometric pictures. I think you’re supposed to feel the opposite way, and I greatly admire people who think and communicate in pictures, but for me, it’s usually a struggle.
This is what our night sky is going to look like in 3.9 billion years: Wow! So what’s going on here? Using data from the Hubble Space Telescope, astronomers at
I recently became aware of this article where a Google exec says - he’s serious - that ‘Nest owners should probably warn their guests that their conversations are being recorded’. That’s assuming the owners themselves are even aware of what these devices are doing, and the likely truth is that they do not. Like needy…
Today we’re going to look at the history of aerospike engines, go over how nozzles work including things like overexpansion, underexpansion and even expansion ratios, we’ll look at the pros and cons of the aerospike, the physical limitations and problems, then we’ll compare the aerospike to some other traditional…
Interactive article about Earth and Sun.
I have suspected for years that the classic buffet line system is a deeply flawed method, so I decide to simulate different methods to find out better ways
Science News, Physics, Science, Philosophy, Philosophy of Science
Yellowstone National Park maintains a collection of sounds and videos taken in the park that are in the public domain and free for anyone to use. The collection
Cross Laminated Timber (or CLT for short) is a structural building material that can replace concrete and steel in new building construction. I wrote about CLT back in April and mentioned that the Gotham Gal and I are in the process of making two CLT buildings right now. The paper version of the New York […]
A 2017 cartoon from this post. After the embargo update (Oct 25): Now that I have some answers from the people involved let me make a quick update: 1) I still find the paper unconvincing, specific…
Nominations for fields that are not being researched as much as they should be
Please click or tap in the gray square below. It will fill with a jolly tableau of colored disks—first big blue ones, then somewhat smaller purple ones, and eventually lots of tiny red dots.
