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[-] SarahValentine 54 points 5 days ago

Sure! At this point in our scientific knowledge, we have a pretty solid grasp of the various avenues by which travelers might get here. This includes the slow but realistic ways, the theoretically possible ways, and the ways that would be tantamount to magical as far as physics is concerned. If there's an unusual EM burst within many light years of here, let alone within the solar system, we detect it. If it happened in the past, we have a very good idea of what traces it would have left in the proxy data of the solar system. We can even detect gravitational waves now, again even at great distances. If something in the solar system moves across our view of the other planets or distant stars, someone notices. These are all different signs that interstellar drives might leave, and we got nothing there.

I could go on to the signs of planetary visitation that we also have none of, but frankly I don't believe in teleportation, let alone at interstellar distances, so I assume any aliens on Earth had to get here some less magical way. And since there's no sign of that, it's a moot point.

[-] Monster96@lemmy.world 7 points 5 days ago

Would the average person know this? I'm not disagreeing with you. I'm just wondering since everything is so censored on the internet nowadays and papers have to go through filter after filter. I'm just huffing copium here but I'd like to think there's something happening out there but the average person like you and I just don't know. It's not like we can see it for our selves.

[-] SarahValentine 13 points 5 days ago* (last edited 5 days ago)

The average person can access telescopes powerful enough to observe objects transiting across planets or stars, or radio telescopes that detect EM signals. As for the gravitational wave detectors, while they aren't exactly open to everyone, the kind of drive signature they'd detect is at this point completely theoretical. The closest thing to a feasible warp drive design that we've come up with still requires a material with negative mass to build. We have no idea how to get/make that, or if it's even possible for it to exist. There's pretty strong theory to suggest that it can't.

You don't have to trust authorities to tell you whether or not aliens have come to Earth. It's just the unfortunate truth that the more things you take note of and consider, the less likely it seems.

[-] Monster96@lemmy.world 5 points 5 days ago

Well, warp drives might not be on the only thing available. Solar sails? Generational or cryogenic ships? Heck, even hitching a ride on an asteroid. Or something even beyond our comprehension. Considering the drive signature is theoretical, what would we even look for? The 'wow' signal was a radio signature but from where? Could be a natural phenomenon, but then again, it could be artificial. There's so much possibilities out there.

[-] rambling_lunatic@sh.itjust.works 11 points 4 days ago

Solar Sails, Generational and Cryogenic Ships: We'd be able to see the craft slowly approaching us. Covering it up would be increasingly impossible as it approaches us because as the comrade from before said, telescopes are readily available technology. Even if there was a coverup of an international scale that had the support of every single institution, it would require dealing with thousands of amateur astronomers and utterly subverting scientific peer-review.

Wow: The Signal has never been repeated. It could genuinely be aliens who sent it by accident. Other more sensitive radio telescopes didn't detect it though. The discoverer believes that while it isn't impossible that the signal is extraterrestrial in origin it could also be some nonsense done on Earth. The signal band is protected but it could be interference from a close-by frequency or someone with a powerful transmitter making the funniest pirate radio broadcast ever.

Asteroid: If they were trying to communicate with their folks back home, there's a good chance we'd pick it up. Furthermore, maintaining a livable space station on an asteroid will generate waste heat and such. Our astronomers would probably notice such an anomaly.

[-] SarahValentine 5 points 4 days ago* (last edited 4 days ago)

Possibilities aren't plausibilities. Like, I don't know if you know what "not a single thing ever, that can't be better explained than to say it was aliens" means. I'm not going to trust Donald Trump to deliver on this one, considering the facts.

[-] fartographer@lemmy.world 1 points 4 days ago* (last edited 4 days ago)

Even without identifying the hallmarks of an interstellar visitor, the so-called evidence of alien intervention is only impressive when analyzed under the scope of lean systems manufacturing. There is not a single ancient wonder of the world that couldn't easily be replicated with basic tools, simple machines, massive workforces, and lots of time.

Basic tools and simple machines: everyone has some concept of the stone age and can understand a demonstration that long, straight, round wood = wheel && wheel = massive work potential.

Massive workforces: put a child in a room with blocks, what do they do? Try to figure out how tall they can stack the blocks. Have multiple children? Eventually, they figure out that working together can create more robust towers. Humans like to build up. Put sand castle tools on a beach? Children and adults aggregate to build the most impressive structure and moat. It's human nature. When there's little else to do, people like to see if they can make big get bigger. The native workforces build themselves, and where gaps exist in teams, there's always slavery in the banana stand.

Lots of time: each pyramid of Giza took around 20-30 years to create. Compared to all of recorded history, that's nothing, but compare it to NYC skyscrapers. The Empire State Building took just over 1 year to build; if people were told that it would take 10, or even 5 years, they would have fucking revolted. 30 years is long enough to enter the workforce, and then retire, or die, or whatever. That's a long fucking time to build one building. Imagine that your parents started working on a pyramid the year you were born: by the time they were done, you'd already be experiencing an existential crisis from your dead-end job and worrying about your parents' mortality.

this post was submitted on 11 May 2026
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