Gravitational Waves Detected From Betelgeuse? Did It Explode?

https://youtu.be/m0ZoKV5KK5s

Human flight.

https://youtu.be/ifI_fwg55k8?t=970

The Terrifying Truth About Bananas

https://www.youtube.com/watch?v=ex0URF-hWj4

This One Thing Is Poisoning All Of Us

https://www.youtube.com/watch?v=VCXHe4pzvak

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