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Either that or as Elon once said, maybe life is just that special. I would still love for someone to do a Bayesian analysis of finding life on a planet/in a gal

Either that or as Elon once said, maybe life is just that special. I would still love for someone to do a Bayesian analysis of finding life on a planet/in a galaxy. It sounds pretty crazy when I say it out loud. We’re staring into infinity essentially. So yeah, life must be out there. But maybe “there” is very very far. Possibly many million light years away. In other words, in a universe with billions of galaxies containing billions of stars, life is likely not very plentiful. I imagine encountering any element besides H/He is usually a discovery (more so if the element is higher up in the periodic order, such as the ones needed for our kind of life). Then again, there is so much we don’t know. Like dark matter (anti-proton/electron/neutron/*). Maybe there is life that exists in anti-everything - (anti-carbon, etc). It won’t be very good if we ever encounter them (our carbon based bodies and anti-carbon based one will collapse on encounter, emanating a staggering amount of energy).

ladams 3y ago
A minor correction: anti-matter is actually regular matter. We understand it quite well, and are even able to create anti-atoms in the lab. On the other hand, dark matter is much more poorly understood: essentially the only evidence we have for its existence are observations of "weird" gravitational effects in the universe.
- hwayne 3y ago
  Also we have pretty strong evidence that, at least in the observable part of the universe, almost all visible matter is regular matter.
8bitsrule 3y ago
> maybe life is just that special. It appears from spectra that the chemical elements produced by stars are the same everywhere. If so, then the possibility of material life exists everywhere in the universe ... where conditions permit. It's down to the presence and concentrations of the various elements, the temperature and stability of some fluid medium that can bring the endless potential combinations into contact, and a lot of time. (Calculating the odds is an exercise left for the student.)

ladams 3y ago

A minor correction: anti-matter is actually regular matter. We understand it quite well, and are even able to create anti-atoms in the lab. On the other hand, dark matter is much more poorly understood: essentially the only evidence we have for its existence are observations of "weird" gravitational effects in the universe.

hwayne 3y ago
Also we have pretty strong evidence that, at least in the observable part of the universe, almost all visible matter is regular matter.

8bitsrule 3y ago

> maybe life is just that special. It appears from spectra that the chemical elements produced by stars are the same everywhere. If so, then the possibility of material life exists everywhere in the universe ... where conditions permit. It's down to the presence and concentrations of the various elements, the temperature and stability of some fluid medium that can bring the endless potential combinations into contact, and a lot of time. (Calculating the odds is an exercise left for the student.)