Proteus

How does this sound technology work, though?

Don't worry about what fortune it would cost. I'm willing to pay it. In all seriousness, though, it doesn't matter if the technology is not readily accessible today — it's for a futuristic science-fiction novel. If the sound is simply blocked, you'd see a vacuum in the sonography, right? Wouldn't be very stealthy. I've heard of primitive prototypes of a metamaterial invisibility cloak which allows the wearer to become very slightly transparent (though still very much visible), but I've never heard of any technology that would allow one to become inaudible. How does this work? Does it use similar metamaterials?

Is there a way to make something undetectable to echolocation?

Which rocks and minerals exhibit natural magnetism, except for lodestone? Which of these is the most widespread?

I once read about a certain mineral deposit, I believe somewhere in France, the molecular grid of which was influenced by the earth's magnetic fields at the time the mineral was formed. Because of this it was useful in paleomagnetism, as one could know from the age of the mineral where the earth's magnetic north was at that time. Unfortunately, I've forgotten how these deposits were called, and how the mineral in question was called. Anyone know what I'm talking about, or, if not, does anyone know how to find this information on Google, ie, which keywords to use? I've tried a couple, but didn't find anything about this subject.

How does supercritical drying work?

Sorry, maybe the word isn't much used in English. tank verb fill the tank of a vehicle with fuel

I referred to the tanking of a ship in full sea. Sorry I forgot to mention that. I heard of this when I saw a documentary about Greenpeace.

Why is tanking for ships forbidden at a latitude higher than 60 degrees?

Aside from being in the habitable zone and having water, what particular evolutionary advantages does the Earth (or the solar system it floats in) have? A few I've found so far: 1) The protosphere, the nebulous disk from which the solar system arose, formed of matter from a heavier star which contained a wide variety of heavier materials. 2) The Earth was formed of a mass which contained a wide variety of elements. 3) The Earth was protected from the impact of heavier asteroids by the proximity of the gas giant Jupiter, the vacuum cleaner of the solar system 4) Meanwhile, smaller asteroids and comets, having less gravitational attraction to Jupiter, were let through into the innermost solar system, providing water, organic materials and minerals. 5) By an amazing stroke of fortune, our planet has a stable moon, which is highly exceptional for terrestrial planets. Usually, natural satellites of planets our size either collide with the planet or rapidly drift away from them. By causing oceanic tides, the moon brings many advantages to the Earth's biology and in particular to its evolution. Without it, it may have taken far longer for life to migrate onto coastal areas and later inland, and for all we know it might never have happened had some of the first sea animals not been swept away to the shore. 6) The Earth has a magnetosphere which repels cosmic radiation and solar mass ejections which would otherwise almost fully sterilize the planet. 7) The Earth has an ozone layer which offers a protection against UV rays. However, as ozone is relatively likely to form in an atmosphere rich in oxygen, this is linked to the probability of high atmospheric oxygen. 8) In addition to having water at all, the Earth has actual oceans, 9) The Earth has plate tectonics, which furthers biodiversification compartmentalizing the earth into many separate as well as non-separate areas, thereby allowing the biosphere to experiment with evolution in different environments; adding to the variety of the terrain will add to the variety of the life-forms inhabiting it.