With a Second Repeating Radio Burst, Astronomers Close in on an Explanation
quantamagazine.org
quantamagazine.org
"We've figured out what causes them!" he spoke to the bored conference audience. They sat up quickly. He continued, "It happens whenever any advanced civilization builds one of these." He takes a strangely shaped device from his pocket. There is a murmur from the crowd. "During the building of this prototype, we have--" and his tentacle fumbled for a moment, and it dropped onto the floor.
4 MILLION YEARS LATER
Astronomers have detected their third fast radio burst, and have almost gathered enough data to discover what causes them.
What remains the same is that they're from really far away and they're short. They can tell they're from far away because the broadband pulse has dispersed relative to frequency and the charges along the line of sight from us to it retard the progress of the longer wavelengths more. So it comes in like a 'swoop' of decreasing frequency on on the spectrum vs. time when reality it was more like a broad pulse.
Or rather, I am quite disappointed that if there is anyone out there, they are not leaving big enough forensics.
(but well done to Occam's razor and the hard working scientists who support it)
I guess maybe the silence is because of such threats out there.
1-https://www.centauri-dreams.org/2012/05/31/is-our-civilizati...
Virtually every single creature on earth has defense mechanisms against others. Stealth, evasion are very common among the life we know--why would that be so likely to be different for alien life?
There are those who would argue that math says they should wipe us out because we might one day be a threat to them, but that's a clearly bankrupt philosophy. If that's really how things worked, then every nation, tribe, family, and individual on earth should be doing their best to wipe out every other on the same reasoning.
That a species would be capable of interstellar travel and not spend millions of years aggressively exploring and colonizing the galaxy as a first priority just seems too alien.
But on a more serious note. You make an interesting point. Our entire history has been a fight for survival against a merciless environment (and other species). It's a core part of our DNA to colonize, grow, and thrive.
But assuming that is representative of what all life would go through may not be safe. It's hard for me to imagine how evolution would create life without the threat of killing off bad mutations, but that doesn't make it impossible. Definitely good to keep an open mind.
I can imagine a species with the same drives as ours, but which doesn't advance beyond colonizing its own solar system, or sending probes to nearby stars, because I can imagine that happening with us. I suspect that, as far as space exploration (much less long term colonization) goes, politics, economics and culture matter far more than our innate drive to find whatever's over the next mountain. We had the capability for manned lunar landings, but didn't follow up with moon-bases or a colony on Mars because that initial drive was fueled by competition and fear between superpowers. We gave up that capability because there was nothing interesting on the moon, and the public stopped caring, and anything but probes started to seem like a boondoggle.
And we're lucky enough to have a moon and a couple of nearby planets to keep us curious. How many technologically advanced but "landlocked" civilizations might there be, who don't venture into space because there's nothing to even theoretically colonize for hundreds, if not thousands, of light years?
Of course, if we had warp drives, things would be different. But the Fermi Paradox suggests that such things are either not possible, or somehow not reliable over the long term, possibly due to energy requirements or something.
Lem's Fiasco is a good exploration of how we project our idea of culture, progress and sentience onto other notional intelligences in the Universe.
When you have satiated your thirst for existence, whats next?
Sustenance of a species requires a major sex/procreative drive. If we stop having at least two children per couple, on average, our population begins to decline. If couples only have let's say 1.5 children on average, we'd start on a path to an asymptotic extinction. And it's an oddly extremely fast thing. If people just have 1.5 children that means your population is declining by 25% per generation. At the current world population, that'd be a population decline of just under 2 billion people - in a single generation. To merely sustain our species we need each and every couple to produce an average of more than 2 children on average to account for the fact that some people are infertile, others will die before maturity, etc.
It's easy to see a million and one ways a species could accidentally drive itself extinct without in any way ever intending or "consenting" to such. Mass devices of pleasure that supplant sex and procreation as primary drives, worldwide perfect birth control and a species that does not choose to procreate sufficiently, social views that result in unsustainable procreative rates, etc.
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The one thing I'd add is that I think the above is extremely unlikely because of natural selection. Evolution will simply select for those that choose not to utilize said entertainment devices, or those that choose not to utilize birth control, or those that have differing social views, etc. The problem here is dysgenics, but that's a whole heck of a lot better than a population going lights out not with a bang, or even a whimper, but a moan.
are you sure you want life to be such a common phenomenon in the universe?
do you think the sense of wonder attached to zipping about in spaceships firing weapons at each other somehow redeems all that suffering?
no, no amount of "good life" is worth the lives that experience:
- burning to death in a fire
- dying slowly of cancer
- being a transatlantic slave
- dying in a concentration camp
- slipping into schizophrenia in a medieval society
to name a very very few compelling examples.
no future can redeem our past.
and how can you imagine these things happening many many times over through countless civilisations across the universe, but then regard it all as some delightful space opera?
well of course, those who shrug and carry on breeding, or those who manage to rationalise it all to themselves, they populate the future.
my sincere hope is that if a super intelligence emerges, it regards this world with a mind free from the survival desperation which being the product of an evolutionary process has imbued us with, and that it then rapidly sets about sterilising as much of its light cone as possible.
The 'chirp' effect of descending tone is due to dispersion and is almost certainly not at the source - https://en.wikipedia.org/wiki/Dispersion_(optics)#Group_and_...