What's the truth about antigravity?

https://www.youtube.com/watch?v=_SGnOeGZUAU

I had a manager who believed that since magnetism is a dipole, that we should also have positive and negative gravity.  The problem with this idea is that it is likely a bad analogy.  I have seen videos stating that gravity is not a force, but a by-product of moving through curved spacetime.  (I am still skeptical of the "spacetime" concept, thinking of it only as a useful and accurate model.)

Anti-matter is simply matter that has an opposite charge.  There is no reason to think that it would be affected in a different way by gravity.  If it were, I think that we would have to rewrite the laws of physics.

Beirut Explosion Analysis and Discoveries - Here's What We've Learned

https://www.youtube.com/watch?v=6lt0xhXqQj0

Betelgeuse Is Not How You'd Imagine

https://youtube.com/shorts/AzGbxQzmViQ?feature=share

Sometime in the next million years, and nobody knows when, Betelgeuse will explode.

https://earthsky.org/brightest-stars/betelgeuse-will-explode-someday#:~:text=Astrophysicists%20say%20we'd%20have,%2C%20very%2C%20very%20bright%20star.

Dark Matter's Last Stand - Scientific American

Scientists are fond of saying negative results are just as important as positive results, but after several decades of not finding something, researchers can be forgiven for feeling impatient. Back in the 1990s, experiments began trying to detect the particles that make up dark matter, the ubiquitous yet untouchable invisible material that apparently fills the cosmos. Since then, physicists have found more and more evidence that dark matter is real but not a single sign of the stuff itself.

https://www.scientificamerican.com/article/dark-matters-last-stand/

However vast the darkness, we must supply our own light

Why TVs Are SO CHEAP

https://www.youtube.com/watch?v=ea987YO-vCI

AMAZING INVENTIONS THAT ARE NEXT LEVEL!

Not sure how many of these are useful.   Some inventions can be cool but not cost-effective.  This reminds me of looking at magazines in the 1970s where they predicted that we would have nuclear-powered cars by the year 2000.

https://www.youtube.com/watch?v=q9jRhq21hVg

What animals are thinking and feeling, and why it should matter | Carl Safina | TEDxMidAtlantic

Wow.

https://www.youtube.com/watch?v=-wkdH_wluhw

This is why we can't have nice things

https://www.youtube.com/watch?v=j5v8D-alAKE

This Is Why Snakes Are Afraid of Mantises

I found this interesting.  I tend to like nature videos.

https://www.youtube.com/watch?v=SMMKiLpgZKw

This is why we can't have nice things

This is interesting.

https://www.youtube.com/watch?v=j5v8D-alAKE

Speed of sound - Wikipedia

I'm surprised that people figured out the speed of sound 300 years ago.

https://en.wikipedia.org/wiki/Speed_of_sound

How the Carbon Taxation Game is Played

I think that that Graph at 9:54 is interesting and relevant to any discussion of Global Warming. 

https://youtu.be/GDiI_fuOXZA?t=593  

However, I don't have much faith in the estimates.   It would be nearly impossible to calculate the total impact of temperature change, good or bad.

Most discussion of temperature change uses the year 1880 as a baseline, presumably because that is when the most accurate records were kept.  Since then the average global atmospheric temperature has risen about 1 to 1.1 degrees celsius.  This is a little hard to know for certain because the NOAA has been fiddling with the numbers, even changing historical temperatures that we have known for decades as part of "normalization".   

However, my point is that the year 1880 was by no means the ideal temperature.  In the winter of 1880 to 1881, there were horrible snowstorms in the northern plains that killed a great many people.

250,000 Dominoes - The Incredible Science Machine: GAME ON!

While watching the video, I was wondering if it ever was going to end, but it is a fascinating watch.

https://www.youtube.com/watch?v=Q0jeohWnmAQ

Do Salt Lamps Work?

I found this video fascinating, and I have probably shared it before.  When I hear people say that they want to add ions to air, I assume that this is a bad idea because ions are reactive chemicals.  It is the equivalent of putting bleach into the air.   According to the video, there are many ions in the air already, but compared to the total number of molecules, the number is not significant.  The video also demonstrates that salt lamps don't really produce negative ions like they claim that they do.

https://www.youtube.com/watch?v=ZQ--scjcAZ4

The History of the World's Highest Jump

We live in a protective bubble whose outside is a hostile universe.  It doesn't seem wise to leave it.

https://www.youtube.com/watch?v=1cAlXqHAqXw

Does reductionism End? Quantum Holonomy theory says YES

Cutting to the chase, an alternate theory called QHT claims to explain everything.  I like the idea of a "simpler" theory, although not really simple at all, that eliminates the concept of an infinite density singularity.  Generally speaking, when your mathematical model produces one or more infinities, something has gone wrong with your theory.  In the past, I heard that infinite density would produce infinite gravity, which seems to make no sense.  I have also heard that Black Holes never stop collapsing; they are in an eternal free fall.

Decades ago I saw where some very fringe scientists claimed that Black Holes don't exist.   They claimed that what we observe are super-massive neutron stars.  Although a simpler theory, it does not fit our current understanding of physics.  Some force would be needed to keep the neutron stars from collapsing further.  I also don't think that this fits the observations.

The summary starts at about 12:22 in the video...

https://youtu.be/fSVbWwivu5g?t=742

Re: Scientists don't know why one-third of U.S. rivers have turned yellow or green - Mic

Algae bloom?

On Thu, Feb 25, 2021 at 9:55 AM Albert <> wrote:

Remember the old kid joke about the Yellow River in China? We would make up a book title and author. This would make us laugh and laugh. As an example, Yellow River, by I. P. Daily. In the light of this article, it doesn't seem as funny as before.🙁

Scientists don't know why one-third of U.S. rivers have turned yellow or green - Mic


https://apple.news/A6QYGO3s3QLezJwF_9b6rCw

The Electric Vehicle Charging Problem

https://www.youtube.com/watch?v=pLcqJ2DclEg

Wildlife Takeover: How Animals Reclaimed Chernobyl

I found this interesting, but it is 50 minutes long.  I tend to like nature videos.

https://www.youtube.com/watch?v=XaUNhqnpiOE

What's Up with Those Bird Beak Plague Masks?

I learned from this:

The word "quarantine" comes from the Italian word "quarenta" meaning forty because they would isolate bubonic plague victims for forty days.

I was well aware of the Miasma theory of disease, which was the dominant theory of disease for 1200 years up to 1850 and beyond when the germ theory disease was just starting and didn't become fully accepted until around 1890.

https://www.youtube.com/watch?v=tzTPOvM9Bpo

Homogenous Vs. Homogeneous: What's The Difference?

Apparently, these are two different words, but I would get confused.

https://www.youtube.com/watch?v=O2H2HJcjVp4

ho·mog·e·nous

1. 1.

   BIOLOGY

   old-fashioned term for homologous.

ho·mo·ge·ne·ous

adjective

1. of the same kind; alike.

Laser Weapon that you can't See or Hear #shorts

https://youtube.com/shorts/LVPL6FjihDA

Is this going to lead to boats and missiles with reflective surfaces?

How Humans Lost Their Fur

This is informative.

https://youtu.be/E76vqlhmBlc

://www.youtube.com/watch?v=E76vqlhmBlc&t=302s

Toyota Plans Revolutionary Solid State Battery for 2021

https://youtu.be/G01xv1RyRVw

Top 10 Human Ancestors

This is pretty informative.

https://www.youtube.com/watch?v=WK1dvXQOUxY

Senate Priority on all committees

Schumer made it clear he's prioritized climate change for Democrats' turn at power for the next two years.

"I've already instructed the incoming Democratic chairs of all relevant committees to begin holding hearings on the climate crisis in preparation for enacting President Biden's 'Build Back Better' agenda," Schumer said of Biden's green jobs plan.

Schumer, McConnell strike deal on Senate power-sharing agreement | Fox News

Amazing hydrogen paste

---------- Forwarded message ---------

From: Larry Trout 

In Powerpaste form, it's completely stable at temperatures up to 250 °C (482 °F). It carries 10 times the energy of a similar weight in lithium batteries, and substantially more than a 700-bar H2 tank of the same weight. The researchers say vehicles running on a Powerpaste powertrain can expect a range "comparable to – or even greater than – gasoline."

When it comes time to release the energy, a plunger mechanism extrudes the paste into a chamber where it reacts with water to release hydrogen at a dynamically controlled rate, which then feeds a fuel cell to create electrical power with which to run an EV powertrain or other device. Part of the paste's impressive energy density comes from the fact that half of the hydrogen released comes from the water it reacts with.

Powerpaste packs clean hydrogen energy in a safe, convenient gray goop (newatlas.com)

I wonder about the cost.

Are Pilot Waves the True Nature of Reality? & 2 Wild theories of quantum mechanics

The standard model of physics is excellent, but incomplete because Quantum Physics and Relativity don't agree.

Quantum Physics is easier to understand if we think of subatomic particles as waves.   Because of their wavy nature, it is hard to pinpoint their exact location, and the particles have some randomness to them.  

Quantum Field Theory (QFT) says that subatomic particles are actually waves in invisible fields that exist everywhere.  This is similar to photons being waves in the electromagnetic field.  

https://www.youtube.com/watch?v=eNJFUo7yHhQ

The pilot wave theory is probably more complicated than it needs to be.

P.S.  I get slightly annoyed when people say that there is no gravity in space.  There is gravity everywhere.  Objects in a stable orbit do not experience gravity because they are continuously falling toward the Earth, but their high velocity is enough to keep them at the same level.

The further away you get from massive objects then the less gravity you will experience, but gravity permeates the entire universe.

Will You Still Eat Raw Fish After Watching This Video?

https://youtu.be/vuGmzUDG97E