Genady

I didn't hear it as a teenager because there was no second opinion then 🙂.

Perhaps you're right. I just think that the humor of this joke is apolitical:

You know as well as I do that correlation does not imply causation. E.g. Far more religious people than atheists reject vaccinations. Far more religious people than atheists are on the Right. Or. Uneducated vs. educated. Etc.

Me too.

Being an idiot is not political. There are plenty of anti-vaxxers on both sides. And were there before Covid, too.

But how is this humor political?

Details matter here. It depends. Which humans? How were they trained? What parameters were given for the analysis?

And the pressure wave went around the world seven times!

The Pompeii story was well known and popular in the USSR. I guess it was "promoted" there thanks to the Russian painting, The Last Day of Pompeii - Wikipedia.

Martinique is a bit far from here, but the Collectivité de Saint-Martin is around the corner. I'll visit there at some time perhaps. P.S. In fact, Martinique is close on the map - it's just more difficult to get there from here than to St. Martin, because of the Dutch part, Sint Maartin.

The story of that convict, with a bit more details (he was jailed again later) is mentioned in the Krakatoa book. Ludger Sylbaris - Wikipedia

Thank you. Added to the wishlist.

Did it have an explanation of plate tectonics then?

... about this legendary but entirely unknown to me until now event. A good book, too.

Today, after going through about one third of this book, I learned that I don't care about English kings.

Even in this case, it is not flat though.

Yes, I got used to it now although when and where I grew up, it was never a question.

I disagree. You know exactly what I call "Earth" in my statement above. But you've changed the meaning of the word. It is a coincidence in English that the patches of the earth and the planet Earth are referred to by the same word. To avoid the language misunderstanding, I can clarify, "Earth, the celestial body, is not flat." It is a hard and fast truth. Yes. And it is still in Politics.

I never know if math is considered science or not. If it is, then it is full of hard and fast truth. Plus, regardless of the math question, isn't the statement "Earth is not flat" a hard and fast truth?

This is not true.

OK, then [math]\frac{xy}{2}=\frac{1}{\sin 2\beta}[/math].

According to the drawing, the radius of the circle is 1. You should've asked me, what is [math]\alpha[/math]. It is an angle between the green line and the axis.

The Riemann curvature tensor in one dimension does not vanish but rather is undefined. It has no components in 1D.

[math]\frac{xy}{2}=\frac{1}{\sin 2 \alpha}[/math]

You are correct. It includes only a finite number of radicals.