We can probably do it once, but we might have to choose one or the other.

1. You can eat them if they have the nutrients you need. Non-carbon-based just means it won’t use carbon as the foundation of its molecular and cellular workings. By mass, there’s relatively little carbon in living organisms and on earth, so whatever’s out there could still use carbon and other elements enough that it has something we could eat. There’s barely any telling what kinds of chemicals will be found in an organism like that, but it could easily be a mix of things we can digest and things we can’t. Even carbon-based life is like that. Wood for example is biologically very similar to us, but is mainly made of cellulose, which we can’t really digest at all.

2. yes, if it fits.

1st question: no.

2nd question… Depends how horny and desperate you are.

God I hope it’s slime girls

Both of those questions will depend on what kind of environment they need to survive. They might need pressures higher than we can or a pH that would be corrosive to us, or exposure to an chemical that is toxic to us like oxygen was to most life that was around when photosynthesis started producing it.

If we can make physical contact with it, we’ll be able to eat it. But if it is based on a different chemistry, I doubt there will be much nutritional value for us as our proteins and vitamins are all based on our chemistry. Hell, there’s a good chance we won’t get much nutrition from alien life based on the same chemistry because they might have evolved with a completely different set of proteins that might do things similarly but connect with each other a bit differently. There’s a symmetrical set of proteins that look like mirror images of ours and would behave exactly the same, but aren’t compatible with ours.

Both of these are matters of will.

Is there anything we can’t fuck?

Head and shoulders for the win

Have you read Sphere?

The article doesn’t say it’s a new theory. It’s about a new study that shows that non-carbon based life might be more common than previoulsy thought:

“It was thought that these sorts of reactions are very rare,” Kaçar said in a statement. “We are showing that it’s actually far from rare. You just need to look in the right place.”

And Andromeda Strain before that.

Eh…

en.m.wikipedia.org/wiki/The_Devil_in_the_Dark

1967

I think it has something to do with the number of electrons in it’s outer shell, and how reactive the chemical is. A biochemist could tell you more than me.

There’s also silicon.

It’s been a long time since I took a biology course, but I think the reason why we believe carbon-based life is more likely is because carbon is far more likely to bond with other elements to form the complex structures nessecary for life at a molecular scale. The only other element that comes close is silicon and it’s no where near as good as carbon.

There’s good reason to presume carbon is required. Carbon has some nice, and totally unique properties that allow it to facilitate life.

The most important features to carbon in this context are:

1. Stable catenation of atoms. Carbon atoms can bond to other carbon atoms in a long chain, and that chain does not become appreciably more reactive. This allows for the construction of very large molecules with specialized mechanical functions.

2. Ability to form stable multiple bonds. Carbon can form single, double, or triple bonds with itself (and oxygen and nitrogen), which allows carbon-based molecules to have ridgid shapes. Double bonds are found all over the place in life because they allow molecules to have sections that aren’t just wiggly noodles of atoms.

3. Bond stabilities that fall in a kind of “goldilocks zone” where carbon bonds to other atoms are strong enough to resist falling apart, but weak enough to be broken later.

4. Nearly identical electronegativity to hydrogen. Carbon pulls on the electrons in its bonds about the same amount as hydrogen. This allows it to make stable bonds that are non-polar, which, when used in conjuction with other, more electronegative atoms (particularly oxygen and phosphorus) allow Carbon-containing molecules to be hydrophobic, hydrophilic, or both simultaneously. This property is what allows for complex structures like Lipid bilayers and proteins to be formed.

No other atom, not even silicon, has this set of properties, and it’s very hard to imagine how you would make all but the most simplistic verson of life without these.

Hydrogen is an element that, when left for long enough in sufficient quantities, begins to wonder where it came from.

You can go one step further: life is just an area of low entropy keeping itself like that by increasing the entropy of its environment.

We poop out randomness to keep ourselves not random.

I mean that is literally what we’re made of. You know those PCR COVID tests? The underlying process just makes DNA/RNA do what they would otherwise do inside the body, outside the body. Put some you-goo through that same process and it just starts replicating all by itself. Everything that makes you unique that’s wasn’t also a product of your environment is digitally encoded in that double helix, and all it wants or knows how to do is ffuuuuuuuuccckkkkkk

You’re just a rabbit hole that math fell down.

Thank you! I was going to make this exact point. Autocatalytic reactions are assumed with good reason to be a necessary step on the way from non-life chemicals to life, but they are only one step. Carbon is the only element that can form the basis of the huge variety of chemicals needed for the simplest of life to evolve.

When I was an undergrad, I had professors who made completing arguments that live on other planets would not only be carbon-based, but that it likely would closely resemble life on Earth on molecular, microscopic, and macroscopic levels. Survival of the fit certainly depends upon the environment, but it also must comply with chemistry and physics. I am no expert in theoretical xenobiology, but it provides a strong and fact-based counter to the idea that alien life would by default be wildly different from life on Earth.

Here is an alternative Piped link(s):

Getting tired of these sensational articles.

Piped is a privacy-respecting open-source alternative frontend to YouTube.

I’m open-source, check me out at GitHub.

Here is the study, “Assessment of Stoichiometric Autocatalysis across Element Groups”, linked in the last paragraph of the article for your enjoyment: pubs.acs.org/doi/10.1021/jacs.3c07041

Ha, I could guess what that link was going to be as soon as I saw it went to YouTube.

If you want to find alien life you need to know what to look for. If life can exist outside of what we have observed in nature. Then investigating these possibilities will increase the number of markers we have to search for life.