Science, page 2
Physics, biology, space, nature, research findings outside psychology. 108 links, newest first. Page 2 of 3.
Links 51 to 100
The physics of colours
Short · instagram.com · Issue #170
A short Instagram post on the physics of colors.
Summary
A short Instagram post on the physics of colors.
The Oblique Wing: Could It Change Air Travel?
Watch · youtube.com · Issue #167
Mustard's video presents the oblique wing, an aircraft wing that pivots to an angled position for high-speed flight and stays straight for low-speed flight.
Summary
Mustard's video presents the oblique wing, an aircraft wing that pivots to an angled position for high-speed flight and stays straight for low-speed flight. The concept dates to 1950s NASA work by Robert Thomas Jones and was tested in 1970s programs. The claimed benefits are lower drag at high speeds and a simpler design than other variable-geometry wings, while flight control at extreme angles remains difficult.
Why Fever Is Actually Helpful
Watch · youtube.com · Issue #166
Kurzgesagt's video asks whether fever, which feels bad, should be suppressed with medication.
Summary
Kurzgesagt's video asks whether fever, which feels bad, should be suppressed with medication. The description calls fever one of the oldest defenses against disease and asks how it strengthens the immune system. Chapters cover what fever does to the blood and whether to fight it with medications.
The Hidden Crowd Engineering Behind Event Venues
Watch · youtube.com · Issue #165
A Wall Street Journal video in which an expert explains how major event venues are laid out to balance safety and revenue, from entry lines at festivals to concession stands at stadiums.
Summary
A Wall Street Journal video in which an expert explains how major event venues are laid out to balance safety and revenue, from entry lines at festivals to concession stands at stadiums. The video covers the arrivals curve, crowd psychology, the art of the queue and departures, and how to move tens of thousands of people through an event.
The Surprising Pattern Behind Color Names
Watch · youtube.com · Issue #162
Vox's video explains why many languages add color words in the same order.
Summary
Vox's video explains why many languages add color words in the same order. It covers a 1969 study by Berkeley researchers Paul Kay and Brent Berlin, who argued that languages add color terms in a consistent sequence, based on a test in which 20 respondents named 330 colored chips. Languages with few color words usually have black, white and red, and later ones add green or yellow, then blue.
The anatomy of an octopus
Short · youtu.be · Issue #162
A YouTube video on the anatomy of the octopus.
Summary
A YouTube video on the anatomy of the octopus.
Mind Field: What Isolation Does to the Brain
Watch · youtube.com · Issue #161
Vsauce's Mind Field episode asks what happens to the brain when it is deprived of stimulation and cut off from the outside world.
Summary
Vsauce's Mind Field episode asks what happens to the brain when it is deprived of stimulation and cut off from the outside world. The host spends three days in a windowless, soundproof isolation chamber, examining the experience from both objective and personal perspectives.
Telescope images are coloured, not what you see
Short · youtube.com · Issue #161
The first photo from space, in 1946, was taken about 65 miles up
Summary
Space telescope images are coloured by NASA to show wavelengths invisible to the eye, so they are not what you would see.
The speaker explains that many space images are not what the universe looks like to the eye. Telescopes such as the James Webb capture light at wavelengths like infrared, ultraviolet, and X-ray, which people cannot see. NASA then assigns colors to these wavelengths, a process called false coloring, to highlight features that would otherwise be invisible.
Key points- The first photo from space, in 1946, was taken about 65 miles up
- James Webb captures infrared, ultraviolet and X-ray light that humans cannot see
- NASA assigns colours to these wavelengths in a process called false colouring
Neil deGrasse Tyson Responds to Terrence Howard
Watch · youtube.com · Issue #159
Astrophysicist Neil deGrasse Tyson responds to comments by Terrence Howard, sharing parts of Howard's treatise.
Summary
Astrophysicist Neil deGrasse Tyson responds to comments by Terrence Howard, sharing parts of Howard's treatise. The StarTalk video covers the Dunning-Kruger effect, a breakdown of the treatise, and how science handles new ideas.
PhET Interactive Simulations
Tool · phet.colorado.edu · Issue #159
PhET is a free online collection of interactive simulations in physics, chemistry, biology, earth science and math, built by the University of Colorado.
Summary
PhET is a free online collection of interactive simulations in physics, chemistry, biology, earth science and math, built by the University of Colorado. The project is supported by the Moore, National Science Foundation and Hewlett foundations.
Addiction is an adaptation to isolation
Short · tiktok.com · Issue #158
Isolated rats chose drugged water and almost always overdosed, per the speaker
Summary
Addiction is an adaptation to isolation, and its opposite is connection rather than sobriety.
The speaker says common beliefs about addiction are wrong. In the classic rat experiment, isolated rats given a choice between water and drugged water usually chose the drugged one. Professor Bruce Alexander's Rat Park, a more social environment, cut overdose rates from almost all isolated rats to none. The speaker concludes that addiction is an adaptation to environment, and that the opposite of addiction is connection.
Key points- Isolated rats chose drugged water and almost always overdosed, per the speaker
- In Rat Park, with happier connected rats, overdoses dropped to zero
- Trauma or isolation pushes people to bond with something that brings relief
Why You Should Stop Rubbing Your Eyes
Read · inverse.com · 5 min · Issue #156
Elana Spivack reports that rubbing your eyes can damage the cornea, raise infection risk and dislodge a LASIK corneal flap.
Summary
Elana Spivack reports that rubbing your eyes can damage the cornea, raise infection risk and dislodge a LASIK corneal flap. Ophthalmologist Douglas Lazzaro suggests it may be a leading cause of keratoconus, a cone-shaped distortion of the cornea. Rubbing also does not reduce allergy inflammation, and the article suggests a cool damp washcloth or allergy eye drops instead.
Do You Have Free Will?
Watch · youtube.com · Issue #155
The Kurzgesagt video asks whether free will exists or is an illusion, setting determinism, the idea that physics fixes outcomes, against the sense that people choose what they do.
Summary
The Kurzgesagt video asks whether free will exists or is an illusion, setting determinism, the idea that physics fixes outcomes, against the sense that people choose what they do. The description argues that our bodies are made of particles that blindly follow the laws of physics, so every outcome may already be predetermined.
White Holes and Wormholes Are Probably Real
Watch · youtube.com · Issue #153
Veritasium's video argues that white holes and wormholes probably exist.
Summary
Veritasium's video argues that white holes and wormholes probably exist. It credits several physicists for their help and cites sources including Kip Thorne's Black Holes & Time Warps and Einstein's 1915 field equations paper. The video was published in April 2024 and is free to watch.
Ventusky
Tool · ventusky.com · Issue #153
Ventusky is a weather website and app with live maps of wind, rain, radar, temperature and more than 50 layers in total.
Summary
Ventusky is a weather website and app with live maps of wind, rain, radar, temperature and more than 50 layers in total. It draws on ECMWF, GFS, ICON and GEM forecast models and includes local forecasts. A Premium tier is also offered.
Annie Jacobsen on What a Nuclear War Would Look Like
Watch · youtube.com · Issue #152
Investigative journalist Annie Jacobsen discusses what could happen minute by minute if a nuclear bomb hit, and how nuclear decision-making works.
Summary
Investigative journalist Annie Jacobsen discusses what could happen minute by minute if a nuclear bomb hit, and how nuclear decision-making works. Chapters cover who controls the nuclear button, the football briefing system, how a launch would be detected, the aftermath and casualties, and the role of AI in military systems. The roughly two-hour interview is hosted on The Diary Of A CEO.
Genetics explains about 70 percent of body weight
Short · tiktok.com · Issue #151
Says about 70% of BMI correlates with parents, based on twin studies
Summary
The speaker says about 70% of body weight is explained by genetics, citing twin studies from Robert Plumman's book Blueprint.
The speaker cites Robert Plomin's book Blueprint for the claim that about 70 percent of body weight, measured as BMI, tracks parental genetics, based on twin studies raised apart. Asked about height, the speaker estimates about 80 percent genetic and adds that diet and sleep also matter, so people may already be near the upper end of their range.
Key points- Says about 70% of BMI correlates with parents, based on twin studies
- Guesses height is about 80% genetic, with diet and sleep also mattering
- Suggests you may already be near the upper limit of your genetic height
Vsauce: What's the Scariest Thing?
Watch · youtube.com · Issue #150
Vsauce's video asks what the scariest thing is and explores how fears develop and whether a single unifying terror exists.
Summary
Vsauce's video asks what the scariest thing is and explores how fears develop and whether a single unifying terror exists. Topics include fear conditioning, the roles of the amygdala and hippocampus, innate aversions, fear of death, nomophobia, and how fear spreads socially through vicarious learning. It also draws on a patient with non-functioning amygdalae.
Chile's Desert Where Fast Fashion Ends Up
Read · nationalgeographic.com · 13 min · Issue #150
John Bartlett's National Geographic article describes how Chile's Atacama Desert has become a dumping ground for discarded clothing from fast fashion.
Summary
John Bartlett's National Geographic article describes how Chile's Atacama Desert has become a dumping ground for discarded clothing from fast fashion. Clothing production doubled between 2000 and 2014, and used clothes arrive at the Iquique duty-free port, where some end up in the desert. Much of it is synthetic and will not biodegrade, while small startups turn textile waste into yarn and insulation.
This Is a Teenager: Tracking Hundreds of Teens Into Adulthood
Watch · youtube.com · Issue #147
The Pudding's video follows hundreds of teenagers first sampled in 1997 and tracks them into adulthood.
Summary
The Pudding's video follows hundreds of teenagers first sampled in 1997 and tracks them into adulthood. It looks at how childhood experiences relate to later life outcomes, using a large dataset. An interactive version of the study is hosted on the Pudding site. The video was published on YouTube in April 2024.
HowStuffWorks
Tool · howstuffworks.com · Issue #146
HowStuffWorks is a portal of articles that answer the questions people wonder about late at night.
Summary
HowStuffWorks is a portal of articles that answer the questions people wonder about late at night. It is aimed at curious readers.
What's This Cloud
Tool · whatsthiscloud.com · Issue #146
What's This Cloud is an educational site for learning to identify and classify clouds, aimed at students, teachers, pilots and skywatchers.
Summary
What's This Cloud is an educational site for learning to identify and classify clouds, aimed at students, teachers, pilots and skywatchers. It offers 126 illustrations, real photographs, guides to the ten main cloud types, a printable chart, step-by-step lessons and flashcards. A 136-page ebook on the ten cloud types is offered free, and posters are sold in the shop. Foxhaven Media publishes the site.
Egg yolk antibodies could counter cat allergy
Short · tiktok.com · Issue #143
Most cat allergies come from the Fel d 1 protein in saliva, skin and urine
Summary
A board-certified allergist says egg-yolk antibodies from hens can neutralise the main cat allergy protein, Fel d 1.
An allergist explains that most cat allergies come from one protein, Fel d 1, found in cat saliva, skin and urine. Chickens exposed to cats can make antibodies against it that pass into egg yolk. A cat food built on this, Pro Plan LiveClear, reduced Fel d 1 in cats' saliva by about 50 percent over four weeks. Homemade egg versions may give mixed results.
Key points- Most cat allergies come from the Fel d 1 protein in saliva, skin and urine
- Hens exposed to cats make IgY antibodies that bind Fel d 1 and pass into egg yolk
- The speaker says a cat food tested four weeks lowered Fel d 1 in cats' saliva
This Transparent Engine Is Fascinating (How Engines Work)
Watch · youtube.com · Issue #142
Destin Sandlin's SmarterEveryDay episode 292 uses a see-through engine to show how an internal combustion engine works.
Summary
Destin Sandlin's SmarterEveryDay episode 292 uses a see-through engine to show how an internal combustion engine works. Its topics include pistons, engine blocks, valve timing and fuel injection. The episode was published in November 2023 and runs about 25 minutes.
How Much Sleep Do You Really Need?
Watch · youtube.com · Issue #141
Joseph Everett's video asks how much sleep people really need.
Summary
Joseph Everett's video asks how much sleep people really need. It looks at whether ancient humans were sleep deprived, the Tsimane people, and whether shorter sleep shortens lifespan. It also lists sleep quality tips: sleep efficiency and timing, bright light, temperature, glycine, magnesium, tart cherry juice, weighted blankets and air quality.
Twelve hours of daily sitting linked to dementia
Short · tiktok.com · Issue #138
Sitting 10 hours a day is linked to about 10% higher risk than nine
Summary
A professor says 12 hours of sitting a day is linked to about a 60% higher dementia risk than nine hours.
Citing a USC professor of human evolutionary biology, exercise physiology and neuroscience, the speaker says sitting 10 hours a day is linked to about a 10 percent higher dementia risk than nine, and 12 hours to about 60 percent higher. Healthy aging is tied to diet, physical activity and social connection, and heavy drinking and poor sleep are linked to decline.
Key points- Sitting 10 hours a day is linked to about 10% higher risk than nine
- Healthy aging is linked to diet, physical activity and social connections
- Only 25% of US adults meet the 150-minute weekly activity guideline
Can the Aging Process Be Fought or Reversed?
Watch · youtube.com · Issue #137
Bright Side's January 2024 video looks at whether aging can be fought or even reversed.
Summary
Bright Side's January 2024 video looks at whether aging can be fought or even reversed. Scientists are said to be researching ways to reverse it, including tinkering with cellular functions and genetic rejuvenation. Research from Harvard Medical School and David Lim is credited.
Can an Octopus Be Trained? Octopus vs Underwater Maze
Watch · youtube.com · Issue #128
Mark Rober's video asks whether an octopus can be trained, putting it through a series of challenges in an underwater maze.
Summary
Mark Rober's video asks whether an octopus can be trained, putting it through a series of challenges in an underwater maze. The maze was prototyped and built with Thunder Laser USA, and tank research came from CustomAquariums.
Logarithms turn multiplication into addition
Short · tiktok.com · Issue #124
Example: 2 times 4 maps to 1 plus 2, which maps back to 8
Summary
Logarithms turn multiplication into addition, and Henry Briggs' 400-year-old tables made calculations easy.
The video explains the logarithm as a curve that turns multiplication on one axis into addition on the other. Using base-2 values, 2 maps to 1, 4 to 2 and 8 to 3, so 2 times 4 becomes 1 plus 2. The speaker says the same works at high precision, and mentions a mathematician who used it about 400 years ago.
Key points- Example: 2 times 4 maps to 1 plus 2, which maps back to 8
- A quarter times 8 becomes minus 2 plus 3, which maps back to 2
- Briggs published a 400-page book of values computed to 14 decimal places
Matter may be vibrating strings, he speculates
Short · tiktok.com · Issue #123
Magnifying an orange leads through molecules, atoms, the nucleus, then particles
Summary
The speaker says matter may be vibrating strings, with each particle a different vibration pattern, though he calls it speculative.
The video explains the structure of matter by zooming in on an orange, then its molecules, atoms, nucleus and particles such as neutrons and protons. The speaker says conventional physics stops at particles, while string theory proposes that they are tiny vibrating strings of energy, with different vibration patterns producing different particles.
Key points- Magnifying an orange leads through molecules, atoms, the nucleus, then particles
- Conventional physics stops at particles, while string theory adds a tiny filament
- An electron or neutrino is a string vibrating in a different pattern
Simulating a Jungle Ecosystem for 365 Days
Watch · youtube.com · 8 min · Issue #109
Dr.
Summary
Dr. Plants' August 2022 video documents a year-long attempt to build a self-sustaining jungle-style paludarium, a vivarium with both land and water. The description highlights vampire crabs and mourning geckos and says the setup evolves into a tightly knit ecosystem.
AI can reconstruct what people see and think
Short · tiktok.com · Issue #108
Reconstructed images shown in an MRI machine by matching patterns in brain activity
Summary
The speaker says AI can now reconstruct what people see, think and where they stand, using brain scans and Wi-Fi signals.
The speaker describes research that reconstructs images from fMRI brain data. Participants viewed images in an MRI scanner, a model learned to map brain patterns to images, and it then reconstructed an image it had not been shown. A later study used Stable Diffusion for better results, and another tried to decode inner speech while people narrated a video. The speaker suggests dreams may no longer be private.
Key points- Reconstructed images shown in an MRI machine by matching patterns in brain activity
- Newer work uses stable diffusion and decoded a narrated inner monologue from a video
- Wi-Fi radio signals alone rebuilt real-time 3D poses of people in a room
Is Time an Illusion? (Great Mysteries of Physics)
Read · theconversation.com · 3 min · Issue #105
The first episode of the podcast Great Mysteries of Physics, hosted by Miriam Frankel of The Conversation, asks whether our sense of time flowing matches how time works.
Summary
The first episode of the podcast Great Mysteries of Physics, hosted by Miriam Frankel of The Conversation, asks whether our sense of time flowing matches how time works. Sean Carroll suggests the arrow of time may come from entropy, which was very low in the early universe. Emily Adlam argues that time does not flow and that the flow we perceive is an illusion.
How Gas Pump Nozzles Know When the Tank Is Full
Watch · youtube.com · 14 min · Issue #100
A Steve Mould video from September 2022 explains how fuel pump nozzles shut off automatically once a car tank is full.
Summary
A Steve Mould video from September 2022 explains how fuel pump nozzles shut off automatically once a car tank is full. The description says the mechanism uses the venturi effect and is clever, but the explanation itself is in the video. Steve Mould is a science communicator.
Body fun facts, some of them myths
Short · tiktok.com · Issue #99
Lists claims such as 25% of humans have dimples
Summary
A short list of body and behavior claims presented as fun facts, such as the tongue resting on the roof of the mouth, the nose and ears never stopping growing, and a scary movie burning over 100 calories. No sources are cited. Some claims, such as a regulator that limits muscles to 60% strength, are myths rather than established physiology.
Key points- Lists claims such as 25% of humans have dimples
- Includes the claim that a scary movie burns about 100 calories
Matt Walker on sleeping outside your home
Short · en.wikipedia.org · Issue #97
A clip featuring Matt Walker, who discusses how the brain works when people do not sleep in their own home.
Summary
A clip featuring Matt Walker, who discusses how the brain works when people do not sleep in their own home.
A Water Treatment That Removes Forever Chemicals
Read · news.ubc.ca · 2 min · Issue #97
UBC engineers led by Dr.
Summary
UBC engineers led by Dr. Madjid Mohseni developed a water treatment that removes PFAS, or forever chemicals, from drinking water. A custom adsorbing material traps up to 99 percent of PFAS, which are then destroyed electrochemically and photochemically, and the material can be regenerated and reused. A pilot at several B.C. locations was set to start, aimed at small, rural, remote and Indigenous communities.
Can You Overdose on Weed?
Read · popsci.com · 6 min · Issue #96
Marion Renault's Popular Science article, updated April 2023, argues that a fatal cannabis overdose is almost certainly not possible, although too much THC can cause serious symptoms.
Summary
Marion Renault's Popular Science article, updated April 2023, argues that a fatal cannabis overdose is almost certainly not possible, although too much THC can cause serious symptoms. It cites NIDA and CDC positions and a 2016 study of 430 poison-center calls about edibles, where about a quarter involved children under five. It also notes that synthetic cannabinoids cause much worse cardiovascular effects.
Speed Comparison 3D: Fastest Man-Made Objects
Watch · youtube.com · 8 min · Issue #88
RED SIDE's February 2023 3D animation compares the speeds of the fastest man-made objects across different years, with everyday objects included for reference.
Summary
RED SIDE's February 2023 3D animation compares the speeds of the fastest man-made objects across different years, with everyday objects included for reference. The description says it was built in Unreal Engine 5.6 and that constructing the scene was harder than calculating the speeds. The figures come from public data, Google searches and surveys, and may be slightly off.
Talbica
Tool · talbica.com · Issue #87
Talbica 3 is a chemistry web tool and iOS app.
Summary
Talbica 3 is a chemistry web tool and iOS app. Its periodic table shows element properties such as atomic mass, melting and boiling points and density. It also balances chemical equations, solves reactions and includes a chemistry calculator. The page targets students and lab workers.
Seeing Theory
Tool · seeing-theory.brown.edu · Issue #84
Seeing Theory is an interactive site by Daniel Kunin, built while he was an undergraduate at Brown University, that teaches probability and statistics through visualizations.
Summary
Seeing Theory is an interactive site by Daniel Kunin, built while he was an undergraduate at Brown University, that teaches probability and statistics through visualizations. It has six chapters: basic probability, compound probability, probability distributions, frequentist inference, Bayesian inference and regression analysis. It includes a donation link.
Bionic Third Thumb: The Future of Human Augmentation
Watch · youtube.com · 12 min · Issue #82
Freethink's Hard Reset episode, published January 2023, looks at artificial body parts that add capabilities rather than only replace lost ones.
Summary
Freethink's Hard Reset episode, published January 2023, looks at artificial body parts that add capabilities rather than only replace lost ones. Designer Dani Clode developed the Third Thumb, a 3D-printed extra thumb controlled by the toes. Her team works with The Plasticity Lab at University College London and Cambridge University to study how the brain adapts to augmentation and to improve prosthetic control.
Big Five beats Myers-Briggs for rigor
Short · tiktok.com · Issue #79
The Big Five covers openness, conscientiousness, extraversion, agreeableness and neuroticism
Summary
The Big Five is more rigorous than Myers-Briggs, which the speaker calls pseudoscience because its results change with mood.
The speaker argues that the Myers-Briggs test is unreliable, since the same person can get very different results depending on their mood that day. The speaker recommends the Big Five personality test, which measures openness, conscientiousness, extraversion, agreeableness and neuroticism, as more rigorous. The speaker calls Myers-Briggs close to pseudoscience, citing low test-retest reliability.
Key points- The Big Five covers openness, conscientiousness, extraversion, agreeableness and neuroticism
- Myers-Briggs has very low retest reliability, the speaker says
- Taking Myers-Briggs on Monday and Tuesday can give very different types
Wait 90 minutes before first caffeine
Short · tiktok.com · Issue #79
Caffeine blocks adenosine receptors, and adenosine rushes in when caffeine wears off
Summary
Delay caffeine about 90 minutes after waking so adenosine can clear, which the speaker says prevents the afternoon crash.
The speaker explains that caffeine blocks adenosine receptors, while adenosine builds up during waking hours and causes fatigue. When the caffeine wears off, the adenosine that is still present binds the receptors, producing a crash. The speaker advises waiting about 90 minutes after waking before caffeine, so adenosine can clear, which the speaker says avoids the usual 2 or 3 p.m. slump.
Key points- Caffeine blocks adenosine receptors, and adenosine rushes in when caffeine wears off
- Wait roughly 90 minutes after waking before drinking any caffeine
- The speaker says the usual 2 to 3 pm crash no longer happens
How Sleep Can Help Solve Problems
Read · slate.com · 5 min · Issue #76
Sleep researcher Kristin E.G.
Summary
Sleep researcher Kristin E.G. Sanders argues in Slate that sleep may help solve problems. She describes targeted memory reactivation, which pairs a learned item with a sound or smell and replays that cue during sleep. In her study, participants who heard cues overnight solved more brain teasers the next morning. Her practical tip is to think about a problem before bed.
Daniel Lieberman: Exercise Has Been Medicalized
Watch · youtube.com · 8 min · Issue #75
Harvard professor Daniel Lieberman, author of Exercised, argues in this Big Think video that modern exercise has been medicalized and turned into something people feel obliged to do.
Summary
Harvard professor Daniel Lieberman, author of Exercised, argues in this Big Think video that modern exercise has been medicalized and turned into something people feel obliged to do. Historically, people stayed active through necessary and socially rewarding activities such as hunting, dancing and sports. The video covers the 10,000 steps myth and the warrior origins of exercise, and claims treadmills were invented as prison torture machines.
Why Don't We Shoot Nuclear Waste Into Space?
Watch · youtube.com · 11 min · Issue #73
Kurzgesagt, an animated science channel, examines why nuclear waste is not shot into space, an idea that looks like an easy fix for nuclear energy's waste problem.
Summary
Kurzgesagt, an animated science channel, examines why nuclear waste is not shot into space, an idea that looks like an easy fix for nuclear energy's waste problem. The description says the idea is 'horribly bad' and gets worse the longer you think about it. It links a sources list and further reading.
Wait an hour before eating after waking
Short · tiktok.com · Issue #70
After an alarm wakes you, melatonin is still high and takes an hour or two to fall
Summary
Avoid eating in the first hour after waking, since melatonin is still high and cortisol peaks, so your body is not ready to digest food.
The speaker recommends waiting an hour after waking before eating. Melatonin stays high for an hour or two after an alarm wakes you, and cortisol peaks about 45 minutes after waking. The speaker describes the morning as a hormonal handover from sleep to stress, when the body is not ready to digest food.
Key points- After an alarm wakes you, melatonin is still high and takes an hour or two to fall
- Cortisol peaks within the first 45 minutes of waking, when digestion is not ready
- The speaker says the body is not ready to digest food in the morning
On the Proper Use of Post-its
Read · tylercipriani.com · 1 min · Issue #68
Tyler Cipriani argues that Post-its should be peeled from the side, not the bottom, because pulling from the bottom curls the note and lifts it off the surface.
Summary
Tyler Cipriani argues that Post-its should be peeled from the side, not the bottom, because pulling from the bottom curls the note and lifts it off the surface. He learned this at a 2015 team offsite, where a facilitator noticed curlier notes kept falling off the wall. The post explains the adhesive, a microsphere adhesive that 3M scientist Spencer Silver discovered in 1968, and includes magnified images of it.
Neural networks learn from examples, not rules
Short · tiktok.com · Issue #49
The speaker says nobody really knows how a neural network works internally
Summary
Building AI is easy: a neural network learns from examples, and the speaker compares its layers to steps in alchemy.
The speaker explains that a neural network learns from millions or billions of input and output examples rather than from explicit rules. Using pictures of numbers as the classic example, the speaker describes network layers and compares the process to alchemy, saying nobody fully knows why it works. Convolutional layers are presented as better than basic linear layers.
Key points- The speaker says nobody really knows how a neural network works internally
- Linear layers work but poorly, while convolutional layers work better
- A basic example maps pictures of numbers as inputs to the number as output
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