(bold mine) That reminds me of this:
Enough is Enough: A Thinking Ape’s Critique of Trans-Simianism
With all the possible values of the variables in the Drake Equation, that figure could easily be a billion intelligent life forms per galaxy (I recall there are 200 billion stars in an average galaxy - 1 out of 200 stars isn't too bad), or one intelligent life form per billion galaxies (which would still give a lot of intelligent life forms in the universe, but lower our chances of ever meeting one).
Of course, the real question is whether any of them have good audio reproduction equipment.
Well, the number of solar systems and planets out there still speaks for that we are not alone - thats how I see it anyways.
“irrelevant as long as we don't know the probability of a red dwarf or a larger principal sequence star to have planets.”
We do, based on Kepler.
We do, based on Kepler.
Netflix doc, One Strange Rock, might chage your mind. Our earth is not very typical, very large moon, iron core, some spots with high radioactivity, the right temp for liquid water, etc, etc. And all of these were necessary for us to become sentient. Then add what it took to become technical enough, ( which includes our selfish drive, which has almost destroyed ourselfs ( doomsday clock)) and those numbers get very small. Then theres time. The way were headed we may be gone in a hundred years, so if the only technical animals on this planet lasted 300 years out of the last 15 billion what are the chances that other beings this advanced are out there right now? Sure theres life out there, right now, but life thats tech enough to find us or vice versa, doubt it. Space is large, so is time.
If there out there and looking, like we are, with radio telescopes, they wont find us for thousans of years, will we still be here is the real question.
with around 10^11 stars in the milky way and 10^12 in Andromeda (our ever closing neighbour that will eat us in about 4bn years) we would have to be a total anomaly to be the only complex life around. But I gain some comfort from the fact that
1. Even if other technologically advanced life exists or has existed we have no way of meeting them
2. The universe doesn't give a flying **** about whether life exists or not and just goes on following the laws of physics.
But given how many new discoveries are being made at the moment in astrophysics our view of the galaxy may well be very different in another 20 years.
I should also note that, we are not the only tool using, problem solving social creatures. Something would take our place provided we don't really really screw up the planet.
1. Even if other technologically advanced life exists or has existed we have no way of meeting them
2. The universe doesn't give a flying **** about whether life exists or not and just goes on following the laws of physics.
But given how many new discoveries are being made at the moment in astrophysics our view of the galaxy may well be very different in another 20 years.
I should also note that, we are not the only tool using, problem solving social creatures. Something would take our place provided we don't really really screw up the planet.
There is not a chance to reach neighbouring stars because of our too short lifespan.
Beings with way longer lifespan can go conquer the galaxie and these do not give a damn to us.
We don't even have a chance to meet them.
Beings with way longer lifespan can go conquer the galaxie and these do not give a damn to us.
We don't even have a chance to meet them.
"with around 10^11 stars in the milky way and 10^12 in Andromeda "
Those are exactly the figures being used to calculate the newer, lower odds of advanced life forms.
Of course, no one knows for sure, but you have to get all the things right at a planetary level (not too big, not too small, iron core, mag field, a decent, relatively stable sun (at least 3rd generation so you have the right element mix in the planets) blah blah and the you have to get all the things right at a biological level for billions of years. Even something like the asteroid that wiped the dinosaurs out. A quarter of the size and they would have survived (having already been around 150 million years prior to that), twice as big and everything except bacteria and very low level lifeforms would have been wiped out so we reset back 1 billion years or more etc. It took over a billion years to oxygenate the atmosphere to the point where complex aerobic lifeforms could develop (so from about 2.7 billion to 1.3 billion years ago).
Anyway, don't let me detract from the important task at hand which is to discuss audio.
"I should also note that, we are not the only tool using, problem solving social creatures. Something would take our place provided we don't really really screw up the planet. "
Chimps are natures back-up plan 🙂
Those are exactly the figures being used to calculate the newer, lower odds of advanced life forms.
Of course, no one knows for sure, but you have to get all the things right at a planetary level (not too big, not too small, iron core, mag field, a decent, relatively stable sun (at least 3rd generation so you have the right element mix in the planets) blah blah and the you have to get all the things right at a biological level for billions of years. Even something like the asteroid that wiped the dinosaurs out. A quarter of the size and they would have survived (having already been around 150 million years prior to that), twice as big and everything except bacteria and very low level lifeforms would have been wiped out so we reset back 1 billion years or more etc. It took over a billion years to oxygenate the atmosphere to the point where complex aerobic lifeforms could develop (so from about 2.7 billion to 1.3 billion years ago).
Anyway, don't let me detract from the important task at hand which is to discuss audio.
"I should also note that, we are not the only tool using, problem solving social creatures. Something would take our place provided we don't really really screw up the planet. "
Chimps are natures back-up plan 🙂
Bonobos are even closer. Unlike regular chimps, they **** face to face, they have stress-relief sex, make-up sex and random hook-up sex, 60% of females are dykes.
My problem here is that there is no evidence for radically different physics anywhere else so we have discovered basically all the raw elements for any other process, and have had some time to observe them over a range of conditions. IMO silicon life forms will remain Star Trek physics.
But given what we know now we didn't know 10 years ago about exoplanets and the general composition of the milky way in another 10 years those odd will be recalculated. As my feeble mind can't even get my head around what a couple of hundred billion stars means I'll have to go on gut feel.
Found some composite pics from NASA the other day where they had imaged individual stars in Andromeda. Not many pixels, but you can pick them out. I raise a pint for the guys and gals doing this stuff as they are really pushing the envelope every day.
A billion years for oxygen? Elon Musk will colonize Mars in decades...
I guess we don't have to start packing our stuff - for the interplanetary migration- just yet.
Not universally agreed upon. Gerta Keller has a very compelling alternative story, I wouldn't mention it if I didn't think it was worth consideration.
You guys are such pessimists. Of course there is life out there! It probably has already visited us, even lately, and is now flirting with some of our Navy pilots.
Dinosaurs were not wiped out. Chickens are proof of that. Cassowarys are probably still not that far from velociraptors (assuming we all know that Jurassic park swapped some names about).
Me, I am just going to think and act on improvements in audio design. I, in recent months, have purchased a number of textbooks on audio and linear design. How about any of you? Of course, I have Bob's new textbook, but there are many others. Anybody recommend anything, or do you just believe that you know everything already? '-)
That would be IMO a different chemistry, not physics. We have on earth plants that are based on a rather different chemistry than usual. AFAIK, clover (trefoil) is the only plant on the planet that can assimilate nitrogen directly from air. They are net nitrogen contributors to the soil, facilitating the growth of other plants. This would make clover about the only plant humans could use to start a natural terraforming process.
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