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How Water Was Preserved on Earth - My Comment:

Berezin was wrong:

"a) the Earth lies strongly inside the snow line" - This does not apply to planetesimals containing a lot of hydrogen.
b) "it was hot on its surface" - There was actually no surface. "Atmosphere" was 2 times thicker than the melt. It wasn't so hot at mid-altitude.
UV shaded:
1. Dust around the Sun;
2. The same thick vapor atmosphere;
3. The sun was still weak, and more - in the IR
Hydrogen did not "leave very quickly into space", but in general managed to escape only partially.
(My Comment)

- Planetesimals formed inside the snow line, in principle, cannot be rich in water. (Berezin)

- 1. First , planetesimals formed , and only then the snow line of the star.
Hydrogen in the primary disk was about 90%.
2. "Brownian" gravitational interaction threw planetesimals from higher orbits orders of magnitude more often than comets now.
of planetesimals , only the size of the proto -Earth in orbits close to the proto -Earth, about 30 (this is not my estimate). The "Brownian" interaction was so strong that most of them fell into the Sun.

- "There was actually no surface":
There was no clear boundary between the surface and the atmosphere - similar to the way it is now in the gas giants.
There were masses of fusible substances, including organic ones, beyond the triple points of the phase diagrams. There were violent chemical reactions.
There were many places where these substances were thrown out to condense elsewhere, including vertically.

By the way, after cooling, billions of tons of complex organic matter remained energetically unstable.
And life is a phenomenon of allocation of structures of anomalously low entropy, accelerating the increase in the total entropy of the system.
Faster spread, "burn" those hypercycles, which increase the total entropy faster. And this is natural selection.

Off topic: I am shocked by your efficiency: So much to study, and still have time to respond to commentators. Even uncomfortable to argue.
(My Comment)
2022 https://naked-science.ru/article/chemistry/water-earth

 

Dentistry Teeth - Business Concept:

Problem: Dentistry:

" - " "The tooth will be reamed, the filling will fall out anyway, it remains only to remove the tooth" . - p search on the forum.
" - " Expensive.

Idea:

Substances that dissolve caries have appeared.
Treat the tooth with such a substance, and then remove the affected parts - with a drill having a hardness - below the hardness of the enamel.
Also, filling materials with high adhesion have appeared.

This business must be highly competitive .

deterrent factors :

1. Pain. Therefore, dental diseases are triggered.
2. Price.

Reasons why teeth are drilled:

2. Inertia,
1. Political Economy - The dental industry generates significant taxes.
Public health = tax cuts. State = enemy of the people objectively.