There Are Scientific Facts

Super fact 62 : Facts exist in science; a scientific “fact” is an observation of a natural phenomenon that has been repeatedly confirmed by independent observers and is accepted as true for all practical purposes.

Outside of mathematics and logic nothing is ever the final truth, not in science, and not anywhere else. However, there are facts that have been so well confirmed and are so basic that there is no reason to doubt them. Earth is not flat like a pancake, and the sun is a star, are two examples of astronomical facts. Most dogs have four legs is another fact. The speed of light in vacuum is the same for all observers is a fact in physics that is surprising if you didn’t know it before. Scientific facts are verified by repeatable careful observation or measurement by experiments or other means. It is possible that we are all living in a virtual reality, like in the movie The Matrix, and that Earth is really flat like a pancake after all, because all of reality is a dream. However, for all practical purposes, it is not the case.

This blog, super facts, deal with facts that are surprising, strange, or disputed by non-experts, and yet true because they have been verified, for example, in the case of scientific facts, by repeatable careful observation. Anyone is free to object if you think I am wrong about a fact.

My next super fact is going to be “Evolution is a fact”. Evolution is also a scientific theory, but it means something different from when you say evolution is a fact. Moreover, a Scientific Theory is not a guess, as commonly but incorrectly assumed. I am bringing this up because many people who are typically unaware of the evidence behind a fact will use arguments such as “science does not know everything”, “it is just a theory”, etc., in efforts to dismiss a well-supported claim.

I should say that this post is inspired by a Facebook post by “The Credible Hulk”, a Facebook page managed by a group of anonymous scientists opposing misinformation around vaccines, global warming, evolution and GMOs. I did not save the post, but it went something like this:

One of the commentors said : “Calling evolution a “fact” defeats your argument. The Theory of Evolution is by definition a theory not a fact. It’s the currently agreed upon hypothesis but not a fact”

What the commentor did not realize is that “Theory” in the context of science does not mean what he thought it did. I am using past tense because he got “schooled”. To his credit he did not respond with insults and neither did the Credible Hulk, which does not seem to be standard on Facebook. However, his comment illustrates something that drives scientists like those who created “The Credible Hulk” nuts, and that is the widespread lack of understanding of the difference between a guess, a hypothesis, a scientific fact, theory as used in common language and used when talking about a scientific theory.

Rather than having this discussion over at my upcoming “Evolution is a fact” post, I am making a separate post about it. I consider “There are Scientific Facts” a super fact because it is true, and yet the confusion around it and what a Scientific Theory pertains is massive, and it is an important topic.

What is Science?

Science is the process of learning about the world through systematic observation and experimentation to gain knowledge about how things work. It involves observing phenomena, forming testable ideas (hypotheses), systematic studies, conducting experiments, and collecting evidence and facts that support or refute those ideas, ultimately leading to a deeper understanding of general truths and natural laws. If an idea/hypothesis correctly predicts and explains facts, it becomes a theory, which is something that is very different from a guess.

The process of making observations, formulating testable hypotheses, conducting experiments, analyzing data, and drawing conclusions to understand phenomena and solve problems is referred to as the scientific method, and there are different types of scientific methods. Some involve experiments, other involve analysis historical artifacts or existing data. Objectivity, reproducibility, falsifiability, and predictive power or problem solving are essential.

Banner research vector illustration concept with keywords and icons for Analysis, Data, Survey, Development, Fact, Knowledge, and Data Entry
Aspects of scientific research include analysis, data collection, sometimes surveys, development, establishing facts, creating knowledge, and data entry so that others can repeat it and verify results. Shutterstock Asset id: 1100776715 by Trueffelpix

What is a Scientific Theory?

When people hear the phrase “evolution is a theory,” many mistakenly assume it means evolution is just a guess or speculation. In science, however, a theory is far more than a guess. A scientific theory is an explanation of an aspect of the natural world that can be or that has been repeatedly tested and has corroborating evidence in accordance with the scientific method, using accepted protocols of observation, measurement, and evaluation of results. In other words, it is a well-tested, comprehensive explanation of natural phenomena, supported by an extensive body of evidence.

3D Isometric Flat Vector Conceptual Illustration of Scientific Method and Knowledge Acquiring. Icons organized in a circle, observation, question, hypothesis, experiment, conclusion, and result | There Are Scientific Facts
Conceptual Illustration of Scientific Method and Knowledge Acquiring. Notice, not all scientific methods necessarily include experiments. Some include surveys, or testing of ancient artifacts, etc. Shutterstock Asset id: 2139402875 by TarikVision

The evidence for evolution is both vast and compelling. It is not just the massive fossil record, it is in DNA, anatomy, there’s geographic evidence, and evidence from dozens of other scientific fields, not to mention that evolution is directly observable. There is a Theory of Evolution, that is the well supported explanation for evolution, or evolution by natural selection. There is also “Evolution is a fact” referring to, for example, the fact that we can directly observe it. It is true for all practical purposes, and that does not mean that evolution stops being a scientific theory as well as a fact.

Afterword

Even though science is constantly evolving and our knowledge is evolving and sometimes our understanding and scientific theories on a topic needs to be updated, scientific facts exist. Some scientific facts are extremely unlikely to change. For example, Jupiter has multiple moons, galaxies exist, global warming is real and is caused by us, and evolution is a fact. Before you decide to dismiss such a fact make sure you know what “theory” means in science, and most importantly educate yourself on the relevant evidence. There might be a whole lot more than you imagined, and you may discover that the evidence you thought was contrary is not evidence.

You often hear “science does not know everything”. That’s true. If science knew everything it would stop. However, the collective knowledge created by science is enormous and as individuals we know next to nothing. So be humble and learn from scientific evidence presented by reliable sources.



To see the other Super Facts click here

Vaccines do not cause Autism

Super fact 61 : An overwhelming body of scientific evidence has proven that vaccines do not cause autism. In addition, research shows that Tylenol (acetaminophen) is not a likely cause of autism.

Autism is a complex disorder caused by a combination of genetic and environmental factors. It is estimated that approximately 80-90% of the risk for autism is genetic. There are other factors that also increase the risk for autism such as advanced parental age, birth complications, and prenatal exposure to certain chemicals or infections. However, despite what many people believe, or have heard, vaccines (and Tylenol) is not one of them.

vaccinating dog on white background, hiding covering eye | Vaccines do not cause Autism
No dog has ever gotten autism from a vaccine. The same is true for humans. Well, dogs don’t get autism in the first place. Shutterstock Asset id: 1676509894 by Vince Scherer

The belief that vaccines cause autism originated primarily from a single, fraudulent 1998 study published by Andrew Wakefield. The study falsely claimed a link between the measles, mumps, and rubella (MMR) vaccine and autism in 12 children. Since then, dozens of high-quality scientific studies, involving millions of children across multiple countries, have found no link between vaccines and autism. One Danish study involved 657,000 children. Leading global health organizations such as CDC, WHO, the American Academy of Pediatrics AAP, have affirmed this conclusion. You can read more about it here, and here, and here. In general, routine vaccines has been shown to be safe.

Some studies have shown minor associations between acetaminophen and autism, but association, or correlation, is not causality. Tylenol is often used more often in challenging pregnancies. Research shows no causal link between Tylenol and autism. This is what Nature, a prestigious, leading weekly scientific journal that publishes peer-reviewed research papers, says. You can read more here, here, and here.

If you focus on the medical research and what reputable medical associations say as opposed to social media memes, talk show hosts, and politicians say, it is obvious that this super fact is true. It is obviously important and yet a lot of people refuse to accept it, including a lot of people I personally know. That makes it a super fact. It is a true and important fact that is surprising or hard to accept for many people.

I try to avoid politics as much as possible in this blog but perhaps this post may seem political to some, but it really isn’t. It’s the government agencies, politicians, political think tanks and individuals who reject scientific evidence that does not support their agendas who are being overly political. Just presenting the facts does not make you political. Just like thermometers don’t have political parties (global warming) neither do statistical tools, DNA or viruses.

What about the Autism Epidemic?

It is true that autism diagnoses have increased by about 300% over the last 20 years. There are two main reasons for this increase. First, the definition of autism spectrum disorder has been broadened. Second, public health programs have increased screening that look for signs of autism at wellness visits for children ages 18–24 months. There is also an increased awareness about autism among parents and in society. The subgroup consisting of severe cases of autism has increased very little if at all. You can read more about that here.

However, it should also be noted that in addition to genetics, which is the major cause, certain factors such as higher parental age, air pollution, infections during pregnancy, obesity, diabetes, immune system disorders, low birthrate, extreme prematurity, are associated with an increased risk. Some of these factors have gotten worse. What is not the cause is vaccines. You can read more about that here, here, here, and here.

Related Super Facts

One of my super facts posts that is related to this post is:

Smallpox Killed 300 million People in the Last Century Before Eradication

A child with covered by severe blisters from smallpox.
Child with smallpox in Bangladesh 1975. Wikimedia commons photo by CDC/James Hicks.

There are also super facts that may not be directly related to this post but that share one particular feature with this super fact, and that is that they are frequent targets of denial, derision, mockery, and misrepresentation by some (or many) of our political leaders.



To see the other Super Facts click here

Superfluid Liquids are Like Magic

Super fact 60 : Superfluids such as liquid Helium cooled below -455.58 Fahrenheit exhibit some very strange characteristics such as it flows right through many solids, it climbs walls, it has near zero viscosity, it exhibits circulating flows that never stop despite no energy being added. It is a Macroscopic Quantum Phenomenon.

When gases are cooled far enough, they will turn into liquids and eventually typically to solids. For example, Oxygen becomes a liquid when its temperature drops to -297 Fahrenheit, which is -183 Celsius, or 90 degrees Kelvin. Kelvin is 0 at absolute zero, the coldest possible temperature, and in addition it uses Celsius for the scale. So, 90 degrees Kelvin is 90 degrees Celsius above absolute zero or 162 degrees Fahrenheit above absolute zero. When Oxygen becomes a liquid, it turns into a pale blue liquid. Oxygen becomes a solid at 54 Kelvin, or −218.8 Celsius, and −361.8 Fahrenheit (at normal pressure). It becomes sky blue ice.

Helium stays a gas until very extreme temperatures. Helium becomes a liquid at 4.2 kelvin or -269 Celsius, or -452.11 Fahrenheit. If the temperature is reduced further by almost half to 2.17 Kelvin, or -270.98 Celsius, or -455.8 Fahrenheit, then Helium suddenly becomes a superfluid, exhibiting macroscopic quantum phenomena. It is so different from normal liquid Helium that it is called Helium II. Its heat conductivity (speed of heat/cold transfer) suddenly increases by one million, and the temperature will become the same throughout the liquid instantly. Even a big pool of liquid helium would almost instantly get the same temperature throughout, and the atoms will start behaving in unison. Regular bubbles can no longer exist (atom sized electron bubbles can exist though).

The liquid starts behaving in bizarre ways. If you place an open metal container of Helium II in a closed room the Helium II would climb out of the container and escape, and a thin film of Helium II would climb the walls and the ceiling. If the floor was made of metal or glazed tile the Helium II would remain on the floor. If the floor was made of unglazed tile or stone, it would leak right through the floor as if the floor was a sieve. If you get a whirlpool or fountain going it will keep going forever without any energy loss. In addition, it would also exhibit many quantum effects that are out of scope for this post.

Superfluid Liquids are Like Magic
Unlike ordinary liquids, helium II will creep along surfaces in order to reach an equal level; after a short while, the levels in the two containers will equalize. The Rollin film also covers the interior of the larger container; if it were not sealed, the helium II would creep out and escape. From : Hampel, Clifford A. (1968). The Encyclopedia of the Chemical Elements. New York: Van Nostrand Reinhold. pp. 256–268 (referenced by Wikipedia). Design: Aarchiba; SVG rendering: Júlio Reis, CC BY-SA 3.0 <https://creativecommons.org/licenses/by-sa/3.0&gt;, via Wikimedia Commons

I consider this a super fact because this is a strange, surprising and not a well-known phenomenon. It is a quantum effect that you can observe with your own eyes. It is important because the discovery of superfluidity and its twin effect superconductivity are very important for science and might lead to revolutionizing energy transport in the future. It is no doubt that the phenomenon is real  (true), and it has been documented by numerous experiments and papers. It is described in thousands of textbooks, and I’ve observed the phenomenon with my own eyes (that is next).

Our Experiment with Superfluid Helium

During my first class in Quantum Physics, we performed experiments with liquid Helium. We started out by cooling helium using liquid nitrogen (colder than -196 Celsius or -321 Fahrenheit). Then using vacuum pumps, we kept cooling the Helium until it became liquid. We continued cooling it and we could see lots of bubbles and boiling as we kept going, and then it boiled extra much, and then very quickly the bubbles vanished, and the content of the entire glass container settled down and then stood perfectly still.

As 2.17 Kelvin was reached the viscosity (flow resistance) was instantly lowered with about one million times, and non-microscopic bubbles could no longer exist. The heat conductivity (the speed with which temperature spreads) increased by one million times. It means that the heat of a drop falling in one end of a swimming pool of Helium II would spread throughout the swimming pool in a second. Except, we only had a glass container in which sameness reigned throughout the liquid.

We continued doing experiments such as watching the Helium II climb walls inside the experimental setup, and of course the famous fountain. Insert a little metallic straw and watch a Helium fountain start to flow, by itself. Without any energy or pressure added, it just kept going by itself because no energy was lost either.

I can add that it was more of a demonstration than an experiment that we actively participated in because playing with extreme temperatures high or low is dangerous. If you’ve read this blog for a while you might remember when I put a Cesium-137 sample (800 times more radioactive than Plutonium-239) in my jeans pocket instead of back into its lead brick container and walked around with it a whole day. Or that time when I replaced a fuse for a 380 volt three phase powered laser with my finger because I was curious what would happen if I put my finger in there, and I was shocked, and it hurt. Students shouldn’t play with dangerous stuff.

Below is a one minute and forty four second YouTube video of a Superfluid / Helium II experiment showing an eternal fountain.


Below is a four minute explanation of a superfluid / Helium II experiment.


I can add that Helium II (super cold helium) is not the only superfluid but the easiest one to achieve.

Other Physics Related Superfacts

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More Science Books for Babies

This is my second and last post covering books from the Baby University series. There are 44 of them. I think the Baby University series books are quite interesting for children. They may not really be for babies, but they appear to me to be great for young children. The point of the books is not to make young children understand complex scientific concepts but to introduce them to scientific vocabulary and build their curiosity. We bought 10 of these books for our soon to be born first grandchild (due date September 17). We also bought other books for him. If you want to see my post for the five first books, click here.

Below I am presenting five books in the series, Evolution for Babies, Nuclear Physics for Babies, Astrophysics for Babies, Quantum Entanglement for Babies, and Newtonian Physics for Babies. For each of the books I am providing my review for the book and a link to my review as well as a link to the book on Amazon and a photo of the front cover.

Evolution for Babies

The front cover of Evolution for Babies is blue and features the title, author (Chris Ferrie) and a green illustration of evolving binkies | More Science Books for Babies
Front cover of Evolution for Babies.

This is the Amazon link for Evolution for Babies.

My Review for Evolution for Babies

Natural Selection as Simple as Possible

This simple board book just shows different kinds of balls falling through a hole until one ball doesn’t. It’s too big for the hole. That’s the surviving ball. Balls like that ball will be the survivors. That is Natural selection. It is very simple, but I guess it is to the point. I guess anyone can understand that. Even a baby.

Nuclear Physics for Babies

The front cover of Nuclear Physics for Babies is light blue and features the title, author (Chris Ferrie and Clara Florance) and a blue and red illustration showing protons and neutrons and a binky.
Front cover of Nuclear Physics for Babies.

This is the Amazon link for Nuclear Physics for Babies.

My Review for Nuclear Physics for Babies

The Blue Balls Keep the Red Balls Together

This book is about red balls called protons. They have a positive charge, and they repel each other. There are also blue balls called neutrons. If you put a blue ball between two red balls, the two red balls will not repel and will not fly apart. The more red balls there are, the more blue balls we need. The red and blue balls are at the center of the atom. If the number of red balls and blue balls is not right the nucleus becomes unstable, and it releases energy. That is radioactive decay. The book explains half-life. So that’s the story. It is simple and fun, and your baby can start working on his PhD in nuclear physics when he turns one years old.

Note: I would like to add one thing that I did not note in my review. The neutrons would not be able to hold together two protons just by being neutral. What the baby book is not mentioning is that neutrons (and protons) have a force that acts like glue, called the strong nuclear force. The strong force, color charges, quarks and gluons is what my previous post is about.

Astrophysics for Babies

The front cover of Astrophysics for babies is dark blue and features the title, author (Chris Ferrie and Julia Kregenow), and there is an illustration of the sun and a binky orbiting the sun | More Science Books for Babies
Front cover of Astrophysics for Babies.

This is the Amazon link for Astrophysics for Babies.

My Review for Astrophysics for Babies

Stars and Planets are Balls. The Sun is a Star

Earth is like a ball, and the sun is like a ball, and the earth orbits the sun. The sun is a star that looks big because it is close. Other stars look tiny because they are far away. Stars are heavy balls of hot gas. Inside stars atoms squeeze together. Smaller atoms squeeze together making bigger atoms and releasing energy in the process. The exploding stars spread bigger atoms across the Universe. The book is colorful and simple reading, but it features the Periodic table, which is not for babies, but ignoring that, this is a simple and fun book for young children.

Quantum Entanglement for Babies

The front cover of Quantum Entanglement for babies is red and features the title, author (Chris Ferrie) and an illustration of a two binkies supposedly entangled.
Front cover of Quantum Entanglement for Babies.

This is the Amazon link for Quantum Entanglement for babies.

My Review for Quantum Entanglement for Babies

Quantum Entanglement Using Balls

We bought this book for our future grandchild who will soon be born. It is a very short board book which takes one minute to read. It is about balls, like most of the “for babies” books. There are two red balls and two blue balls. Hide them in boxes. We know the colors, but Alice and Bob do not. However, in quantum physics the balls have a special bond. We put the tangled balls in two boxes. When the boxes are opened, both balls are blue or both balls red. What’s the point?

I am an adult who knows a little bit about Quantum Entanglement, and I did not understand what they meant. How is a baby going to understand it? It is a nice colorful board book but I wish they’ve taken a different approach.

Newtonian Physics for Babies

The front cover of Newtonian Physics for babies is green and features the title, author (Chris Ferrie) and an illustration of a binky with three red arrows representing forces | More Science Books for Babies
Front cover of Newtonian Physics for Babies.

This is the Amazon link for Newtonian Physics for Babies.

My Review for Newtonian Physics for Babies

Newtons Laws and a Ball Explained to the Very Young

We bought this book for our future grandchild who will soon be born. It is a very short board book which takes one minute to read. The book is about a ball. A ball feels the force of gravity, and it is pulling it down. When the ball is on the ground the ball still feels the force of gravity but the ground pushes back with an equal force and the ball is at rest. If there is a net force the ball moves.

At the end the book lists the three laws of motion. 1. If an object has zero net force, it does not change its motion. 2. The net force is equal to mass times acceleration. 3. For every force, there is an equal force in the opposite direction. It is very simply expressed, and the illustrations are fun, but I still think this book requires the child to be a bit older for him to understand, maybe 3-4 years old rather than a baby. However, I think the book can evoke an interest in science and physics at an earlier age. Despite it being one of the tougher books in the series, I think it seems to be a pretty good book.


To watch a woman read Astrohysics for Babies. Click on the YouTube video below.



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