And one more cross-post so all coronavirus posts will appear here ...
It's hard to believe that some people still believe in a flat Earth. There's even a Flat Earth Society where you can keep abreast of the newest developments.
It may sound crazy, but Flat Earthers provide several compelling arguments. According to Einstein, gravity is indistinguishable from acceleration. Imagine two different scenarios:
#1) Earth is a sphere large enough to have its own gravity. Someone standing on Earth's surface will feel a constant downward acceleration (what we call gravity). If you drop a ball, it will start falling slowly, but then quickly build up downward speed until it hits the ground.
#2) Earth is a flat surface, constantly accelerating upwards. If you're standing on this surface and drop a ball, it will first appear to hover over the ground, but then the upward accelerating ground beneath it will speed up and catch up to it.
In both situations, when you perform an experiment (dropping the ball), it looks exactly the same. So, how can you tell the difference? According to Einstein, you can't tell which is which just from the experiment itself.
So ... crap? Could Earth really be flat?
If you visit the FES site, you can get educated on how everything works ... they have an explanation for everything. From the picture above, you can see the flat Earth, with the North Pole in the center, and then the impenetrable ice shelves of the Antarctic at the border, helping to keep all the oceans' water from falling into the abyss below us.
Also note the sun floating above our world. This picture doesn't show it well, but the sun is like a lamp with a shade to help it shine down on different parts of the world depending on the time of day. The moon also orbits above our world ... in the current picture, its location would provide a full moon phase at night. As it moves to a different position in relation to the sun, you get all the other different phases.
They even have explanations as to why the sun sets ... it's an illusion due to the refraction of light as the lampshade starts turning away. Solar and lunar eclipses? There are complex explanations for those as well.
So how can we tell if Earth is really a sphere? Why should we believe the images that NASA provides to us? How do we know that they're not keeping us in the dark, and keeping us from the truth?
Hopefully I haven't convinced you that Flat Earth Theory (FET) is true, but I think it very important to demonstrate how much work people are putting into this, and how easy it is to justify it with the visage of science and math. In fact, I've tried myself to construct a flat-earth model that works consistently with our observations, just to see if it could be done. I still haven't quite managed it, though -- something always comes up to break it.
For example, if you look at the picture above, the "Southern Hemisphere" is stretched out much further than the inside "Northern Hemisphere." This would imply that planes flying in the Southern Hemisphere would take much longer to get to their destinations than planes in the Northern Hemisphere. This one issue by itself destroys FET and convinces me that our Earth is round.
But, one who is not so rehearsed on math, science, and correct principles, may easily be swayed by these intelligent-sounding arguments.
A famous rapper, BoB, tells us he's been in a plane high in the sky and didn't see any curvature, and he has recently tried to raise money to launch a satellite into space to prove it. Also, daredevil Mike Hughes started building rockets for the purpose of eventually launching himself into space high enough to see for himself if the world was flat. He ended up dying earlier this year in a failed rocket launch.
Enter the idea of "settled science," a term you've probably heard several times in the past few weeks. From a strict interpretation of the scientific method, it's nearly impossible to have "settled science," as science promotes the idea of skepticism. You start with what most people believe (a null hypothesis), you present a challenge -- an alternative theory (the alternative hypothesis), and then you perform tests to see which hypothesis wins.
Probably the most famous example of this is Newton's laws of motion and gravity, which made sense until Einstein came around to present his own laws, which did a much better job of explaining everything ... and it was revolutionary. Einstein's alternative theory won out. Newton's strongly held "settled science" theory was overthrown! (Sort of.)
Since we can't have 100% certainty on anything, we must settle for "settled science" to mean "we're 99.9% sure this is right." There's nothing wrong with challenging even the most stalwart theories, but in order to get things done, scientists and engineers need to accept what's close enough to reality for practical purposes. Thus, experts tend to hold to the stalwart theories and follow them until something better comes around.
Back to Flat Earth ... so what do you think? Is the Earth a sphere? Is it settled science? The number of people who believe FET is very small. Though, there are still some otherwise competent mathematicians and scientists trying to challenge the notion of Round Earth. We find it easy to laugh at these guys because it's just a very, very small following. We can all pat ourselves on the back because we know better.
Then, there's something called "Occam's Razor." It's the idea that if you have two competing theories to explain the same phenomenon, chances are, the most simplest explanation is the true one. When it comes to FET, I might be able to successfully create an isomorphism from Round Earth to Flat Earth Theory -- it would require a very complex set of equations and rules, such that it would be much easier to accept Round Earth Theory, as its equations are simpler, and it just "makes sense." This is the power of Occam's Razor.
In fact, everyone who does anything related to world travel uses Round Earth Theory. Planes tend to travel in Great Circles around the world, because that's proven to be the shortest distance (rather than a straight line). Satellites are placed in orbit around our planet using Round Earth Theory equations. Otherwise, our satellite TV wouldn't work, and neither would all of our GPS devices.
So, the Flat Earthers can believe what they want, but the people doing the navigating are all using Round Earth Theory -- without even giving it a second thought. Why should they care about competing FET ideas when Round Earth Theory works perfectly fine?
And finally, from the start of this post, you already know where I'm headed with all of this -- the recent pandemic.
When it comes down to it, pandemics are really simple math. The SIR Model explains the movement of a disease through a Susceptible population. As each person gets Infected, they will eventually Recover (or die), and eventually one of two scenarios play out: #1) the disease dies out, infecting only a portion of the population -- with some people reaching the Recover/Death stage, and the rest remaining indefinitely in the Susceptible stage. OR #2) the disease infects everyone until everyone reaches the Recover/Death stage.
This model along with other competing models rely on a set of underlying simple differential equations, and we have a long history of outbreaks to study, and fine tune our models.
The current coronavirus outbreak (SARS-CoV-2) is not unlike many of these other past outbreaks. In fact, some mathematicians have expressed wonder at how closely the spread of the disease matches popular epidemiology models. (Though, there are some local off-ages as this particular strain exhibits a "superspreader" nature -- where it seems to spread in chunks rather than in smooth patterns like the flu.)
From earlier, similar outbreaks, epidemiologists have determined what tactics and strategies work in combating viruses. In the case of respiratory diseases ... universal mask wearing works very well. We have not only seen this in earlier outbreaks, but we've even seen it already in the current SARS-CoV-2 outbreak. Countries that are used to outbreaks put on their masks with hardly a second thought, and have already effectively eradicated the virus -- except for onesies/twosies coming mainly from foreigners. And countries who later adopt mask wearing enjoy a sudden drop in cases after a couple of weeks of consistent habits.
In a sense, this is all pretty much settled science. Or at least, prior to 2020, there had already existed plenty of experience to support these ideas. And much of what I know on outbreaks I had learned prior to 2020. You can't really learn basic modeling of data without having some exposure to exponential, S-curve, and other distributions that describe outbreaks. In fact, one of my textbooks was on how to truncate data effectively, geared more toward medical applications.
I suppose a little bit of inconsistent mishandling of the pandemic by the WHO and a lack of direct experience in the US has led to our current situation where most people don't seem to know how to behave in such a way to effectively fight the virus and eradicate it (as many other countries have already successfully done). And perhaps it's the whole idea of "free thought" in the US that has given credence to competing theories.
Unlike FET, where a very small people believe the very few skeptics, we have a situation where a very large number of people believe the very few skeptics ... and most frustratingly, it has become yet another highly charged politicized topic -- which has unfortunately led to too many unnecessary deaths.
To me, the solutions are very simple ... we could have eradicated this thing months ago, and avoided a nationwide shutdown. But we were lazy and we let it get out of hand. In April, our lockdowns helped us to get a handle on things -- numbers were going down, but then we thought it was safe to reopen everything, and we didn't do so safely. So (as what exactly happened in 1918-1920), cases in the US have blown up to levels not seen anywhere else in the world.
Instead of taking simple measures to win, we're flooded by crazy conspiracy theories ... the Democrats are trying to nuke Trump's reelection chances ... Bill Gates is trying to sneak in microchips in the upcoming vaccine ... masks are activating COVID that's been around for at least a decade ... hospitals are lying about the deaths and attributing them all to COVID, and so on.
There really is no difference between FET and these pandemic conspiracy theories, and I'm not sure what I can do about it. I can only watch in disbelief, and hope for the best. How can someone really ignore what is going on outside of our borders?
Despite the fact that these conspiracy theories are enjoyed by a large chunk of people, the theories are still worthy of ridicule and scorn. Unfortunately, this is very difficult to pull off on social media, because your friends are likely to take it personally. I always try to attack the ideas and not the people, but peeps today are very fragile. My goal is to help people understand so they can behave in such a way to help fight the virus ... together. But that's not how they take it.
Most people are being manipulated by forces intent on dividing our nation and to increase the spread of the virus -- encouraging "not settled science" as their battlecry, and "1st Amendment" / "freedoms" (without realizing that wearing masks is a means to enjoy more freedoms), and "you can't stop this virus -- no one can" (even though so many countries have demonstrably done so), and so much quoting of bad science studies.
I wish you all well, and be smart! Listen to the experts because they've been doing this for years. Ignorance can only kill, and intelligence is the only way to win. My hope is that if you can see the silliness of FET and understand how some people come to believe in it, then you may also be able to see the exact same things in COVID conspiracy theories today.
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