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Ooooh thank you! I've been getting really interested in the human gut biome and how it effects mood, metal and physical health and even intelligence. I will definitely be checking this out! Would this be better read or could one listen to the audiobook at work, in your opinion?

"I contain multitudes" by Ed Yong is also a great book on the subject. It does get pretty heavy but summarizes the big picture of our evolution with microbes. He often compares the microbiome to a new frontier.

Here's a good synopsis of the book https://www.theguardian.com/science/occams-corner/2016/aug/25/lifes-little-surprises-i-contain-multitudes-ed-yong

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Also a question of how astrological bodies are formed. There's a large amount of those elements that are easily accessible in asteroids. If there was ever a reason to asteroid mine, it would be for those elements. Iron being pretty prolific in general and in asteroids probably does go well with their siderophilic properties, which is probably why we tend to find those elements in large amounts in asteroids.

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The most interesting effect is isotopic fractionation. Heavy water, has a melting point of 3.7 Celsius.

If you repeat the process of removing the melt from ice many times, you'll make heavy water ice.

Well, in larger planets like jupiter and saturn the intense pressure creates liquid metallic hydrogen. Liquid metallic hydrogen is a phase of hydrogen in which it becomes electrically conducting like a metal. Because hydrogen is the simplest molecule, just one proton and one electron, it forms a simple solid when compressed or cooled. Under high pressures it becomes superconducting and behaves like a superfluid. Superfluids are insanely weird. They defy gravity with viscosity and can even seep through things we consider impenetrable to liquids. https://aip.scitation.org/doi/10.1063/5.0002104

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I thought somone would mention isotopic fractionation. Heavy ice, made from heavy water, melts at 3.7 Celsius, so this processes repeated many times would concentrate heavy water.

Could you tell us a little more about the seasonal modulation of microseismicity? Which seasons?

I have no interest or real knowledge in geology and this was an absolutely fascinating and quite cool read! Very easy to understand too! Thank you!

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Eventually; iron is the sink for fusion of lighter and decay of heavier. But "dead" stars are often not mostly iron.

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