Earlier quoted context omitted.
You're right that fossil fuels are contingent. They exist because of a big evolutionary coincidence that might not be repeated on other worlds. It's possible, though, that aliens might not need fossil fuels to get to space. If they had more efficient photosynthesis, for example (ours is Or it's possible that we're the most advanced because fossil fuels are necessary and nobody else got them.
Wait, can you elaborate on that? Cursory glance at google suggests there can be sufficient other sources of hydrocarbons aside from dinosaurs being wiped out by a meteor.
Mars rover is frozen in place following software error
51–60 of 73 posts
Re: Mars rover is frozen in place following software error
#52Earlier quoted context omitted.
Ah yes, the programmers blame the engineers, and the engineers blame the programmers
Let's not forget the compilers. They're always messing stuff up!
Every real toolmaker is gifted with perfect precognitive capabilities so their tool behaves exactly as it should for all users, don'cha'know.
Re: Mars rover is frozen in place following software error
#53Earlier quoted context omitted.
Finding life on other planets means life was probably seeded on earth instead of the 'Spontanous Generation' theory of biology where RNA just happened on earth at some point. It also opens up the possibilities of life existing outside of earth. I don't know whats not mind blowing about that.
As a biologist, it's pretty cool, although not quite as cool because it's the same life. Different life, evolved on different planets, would be cooler. It would use some of the same tools, like phosphates as signaling/energy molecules, because nothing else can do the job. But alien life could use different amino acids from the ones we use, or something different from amino acids instead. They would probably be linear…
Re: Mars rover is frozen in place following software error
#54> Thanks to Curiosity, we have a better idea of where water existed (and may still exist) on Mars, as well as where we might be able to find evidence of ancient life. I don't understand why everyone is so excited about finding life on Mars. Life on Mars means life may be relatively common on water-bearing planets, which means the Filter is more likely to ahead of us than behind. https://www.youtube.com/watch?v=sNhhvQ…
there's no reason the Great Filter couldn't be both ahead and behind us. - Life on planets with fossil fuels available advances to an industrial phase and dies off either from nuclear war or global warming - Life on planets without fossil fuels never advances to even the iron age.
Re: Mars rover is frozen in place following software error
#55Earlier quoted context omitted.
Having worked on autonomous robot hardware i beg to differ
Ah yes, the programmers blame the engineers, and the engineers blame the programmers
Re: Mars rover is frozen in place following software error
#56Earlier quoted context omitted.
Viewed another way, a successful bugfix brings a $2.5B instrument back to life.
And it demonstrates that the design allowed bug fixes while the rover is on another planet. I view this as big success for the engineering. They did a great job. It’s more important to have the ability to fix bugs than avoiding bugs.
Re: Mars rover is frozen in place following software error
#57Re: Mars rover is frozen in place following software error
#58Earlier quoted context omitted.
We don't have any evidence of life being common.
True. But we have prima facie evidence that advanced civilizations -- as advanced as we're about to be, in not very much longer -- are very rare.
Re: Mars rover is frozen in place following software error
#59Earlier quoted context omitted.
As a biologist, it's pretty cool, although not quite as cool because it's the same life. Different life, evolved on different planets, would be cooler. It would use some of the same tools, like phosphates as signaling/energy molecules, because nothing else can do the job. But alien life could use different amino acids from the ones we use, or something different from amino acids instead. They would probably be linear…
Don’t pressures and temperatures impact which chemical classes can do which job?
It's possible life could exist on neutron stars, or in stellar photospheres, or in the atmospheres of gas giants. And life might not be obvious. Life as we know it is not an obvious prediction given carbon, hydrogen, oxygen and nitrogen as a starting point. So maybe it turns out that certain combinations of minerals do something interesting when you immerse them in an ocean of liquid chlorine. We wouldn't know.
But so far as we know for sure, life has to start with liquid water, which narrows the range of admissible temperatures to 0-100 C and pressures around 1 atmosphere. Hyperthermophile bacteria can live in boiling water (up to 120C). We use some of their enzymes to do genetic engineering on normal cells. The temperature change isn't enough stop the hyperthermophile proteins from functioning (and they're pretty sensitive). Likewise there are psychrotolerant (cold-dwelling) cells that can live near 0C, using mostly normal proteins.
So I think life as we know it is locked into one regime of "normal" chemical behavior.