Aliens Definition and 83 Threads

Hello everyone, I need some statistics help relating to one aspect of the Fermi Paradox. The Universe is a very big place and even if there are millions of other alien civilizations out there, they are likely so far away from us that we will never ever meet them. But another factor that will...

I read much science fiction as a teen but got fed up with the limited imagination. The aliens were always based on some known species : octopi, lions, wasps, etc. and the social system was usually a thinly disguised Roman Empire. Sure, you can write good stories in that framework, but I...

User New here but this conundrum is something that occurred to me as I was watching a physics video and I have run out of ways to ask about this. So here I am. Ok first principle. the setup. let's say we have invented a perfect telescope on earth. such that we can resolve any object no matter...

I'm currently reading Neal Asher a little more systematically. The books I read previously turned out to be part 2 of 3 and the-like. This time I started with the standalone novel "Prador Moon" as I think the Prador aliens - even if maybe just a "little" over-the-top - is one of the best alien...

I personally don’t think they do. I’d love to hear your guys’ opinions.

I would like to know your opinion about this. Do you think we should try to contact aliens? I think it's safe as long as we choose stars as old as the Sun or younger. I also think that, if a nearby civilization hasn't contacted with us yet, it's probably because they don't have the means to...

We all heard about Roswell. A weather blob fell off the sky and the locals, after seeing materials unknown to them until then and the army surrounding the place, they thought that aliens landed in their peaceful town. Some people still believe that. And it's no surprise that ever since then...

In a story I’m working on, the antagonists are (humanoid--almost identical to humans) aliens, with 2 eyes, binocular vision. Their tech and bio-engineering is several hundred years advanced from ours. They can see the (human) visual spectrum, but also into the infrared (how far I haven’t...

See my previous post! https://www.physicsforums.com/threads/do-gravitons-have-frequency-like-photons.957146/ Let's say we had some aliens that had the ability to emit/interact with gravitons with frequency roughly in the range corresponding to human hearing (20Hz-20KHz), and that they had an...

Have watched lots of scifi & fantasy movies over the years. While entertaining at times, now find myself being critical of the way they depict aliens. A lot of them appear as reptilian with big fangs and claws yet seem to be able to control complicated space vessels and machinery. It is my...

According to a survey in 2017, nearly half of the Americans believe, that aliens visit earth.However, I think that a lot of conditions have to be met, so that aliens would visit earth. First of all, they have to exist. Meaning their home planet has to be a habitable planet (but only a very...

If alien were to establish a colony on earth, do they need human permission? ----------------------------------------- let's say they show up on sky where not belong to any country and create artificial island on international water to set up their own colony. even assume that they were...

We can indirectly measure the atmospheric composition of worlds outside our solar system. Suppose there are aliens out there. On their world, they use the same technique we use to measure the atmospheric composition of worlds. Suppose they turn their telescope on Earth. Is it possible they...

There has been much debate about SETI (Search for Extra-Terrestrial Intelligence) and whether or not we should try to contact ET. Some (Including Stephen Hawking) have argued it is a bad idea to announce "We're here" as the aliens would likely come here, squash us like an ant hill in Africa...

I asked myself this question today, found that exact question asked here (February 10, 2005)... and I could not say anything, not even a squeak. Well, boil that dustmote! "Why would aliens come here?" I ask and the voices in my head speak. We are far from the galactic center of an average...

Scientists are looking for Earth like planets/bodies to find life on other planets/bodies, somewhere that is warm enough that liquid water can exist, and somewhere with basic organic molecules. Here's where I have a concern, in the 4 billion years of Earth's life, to our knowledge life had only...

OK, in my story with a human colony ship headed to a new planet, I'm thinking of making the life on that planet originate from a comet carrying life with a shared ancestry to Earth life. Which means that they'll be a bit less alien than they otherwise could have been. They will share a lot of...

To date we have not picked up any signals from aliens. Some take this as a sign that we are alone in the universe or that intelligent life and culture, if it exists elsewhere, is rare. What I am not clear on is what we are expecting to find. Reversing the argument, if aliens were searching...

...they land on April 1st. Merry confusion ensues.

This is something that got me thinking for a while. Especially after learning the basic of physics and chemistry. Basically, pretty much every movies, novel, etc that feature an advanced race of aliens(or any alien in general), they gives them some sort of technology or their organic...

There is an aspect to this SETI problem that has not yet been considered. I'd post the entire article here if I could, but the copyright is not mine for one year. (Yeah, I wrote this.) https://omni.media/all-advanced-aliens-are-in-happiness-boxes Any SETI scientist who reads this is going to...

https://www.sciencedaily.com/releases/2016/01/160121110932.htm Date: January 21, 2016 Source: Australian National University Summary: The universe is probably filled with habitable planets, so many scientists think it should be teeming with aliens. But life on other planets would likely be...

I’d like to start off by thanking everyone that’s posted on this site. I just spent two days reading everything on Writing and World Building. Actually that’s a lie, I didn’t read everything, I read every thread on the Writing and World Building forum that might possibly answer the five...

One big plot hole seems to be the fact Star Wars is set a long time ago in a galaxy far, far away and yet somehow there are humans. Can anyone tell me whether they are actually humans or whether they just have an extremely uncanny resemblance but are in fact another species, is there concrete...

What do you think of the following scenario*? Aliens are future humans who discovered faster than light travel. They propagated throughout the universe. In so doing they traveled back in time, to our time, or even earlier times. *I read this in a popular space opera novel. It may have been...

Hi guys, So If any of you aren't familiar with the Fermi Paradox, I highly advise you read about it. It is easily one of the most interesting topics I've come across. IF you can't be bothered for this I have included a small summary of what the Fermi Paradox in my survey (see below). I'm doing...

Are we alone AND what are the ways we can search alien life?

In the clear calm night,I'm out doing yoga exercises. My body will shine emiting infrared radiation as it stays blackbody radiation principal. So my particular question is , is it possible for some remote aliens on its remote planet to catch my infrared fringerprints of the image (with respect...

Hi, I'm working on a commissioned story, the basic jist of it is aliens colonize earth, begin a lengthy process of terraforming it to fit their toxic homeworld atmosphere. I read somewhere chlorine is the most viable alternative to oxygen in terms of energy production and it's fairly common in...

I surf through Ancient Aliens every now and then and generally can't stand it for more than a minute or two, but I keep at it because every now and then they come up with something so outstandingly moronic that I practically fall out of bed laughing. I've posted a couple such on here. Recently...

I've been turning something over in my head for a bit and I wanted to check some math. It has to do with how long it would take a hypothetical alien civilization to colonize a big chunk of nearby space. Over at the...

I've pondered this a lot recently. I am an amateur electronics enthusiast. Recently I've been trying to build my own capacitors, resistors and radio/tv receivers/transmitters from scratch. A thought occurred to me, what would alien technology look like? and would it evolve the same way ours did...

Is the distance too far and/or the trip too dangerous for inter-galactic space travel by aliens wanting to reach Earth?

Puma Punku in bolivia and Peru amazing stone cutting make me suspect aliens had done that , cuts are so precise and so impossible to realize today with our ''modern technology incline to think of a desintegrator cutting tool ( energy field that break atoms bonding )

the best "Ancient Aliens" yet ! Ancient Aliens is SO amazingly stupid and misinforming that it is sometime (rarely, I admit) actually hilarious, so I stop on it for a minute or two sometimes when I'm channel surfing just to see what kind of blather they have that night. On occasion, I get a...

History Channel's "Ancient Aliens" I watched a few episodes of this after repeated requests from my friends ,i not really convinced by their theories but since my knowledge of physics is limited ,i might need some help in either dismissing or accepting their theories, i hope those who are...

Hello I was thinking about how could we think if we arrived to a new planet and found a strange buildings and a complicated machines but we haven't found any living creatures or aliens , just a srange buildings and macheins , could that be an evidence for the existence of aliens ?? we haven't...

I've thought about dark matter and I'm wondering if it could possible be made up invisible bouond states of ordinary matter? Wikipedia says "According to consensus among cosmologists, dark matter is composed primarily of a new, not yet characterized, type of subatomic particle." But why a...

So here is the setup: I know a bunch of people who think it is the dumbest thing ever or absolutely ridiculous to say, "I don't believe aliens exist." What is your stance on that question? Here is what I currently know: +I have seen no evidence for alien existence Therefore, I don't believe...

Today I was wondering, what do you all think would happen if humans discovered aliens that were more intelligent than us? What would happen to religions that believe in God and such? Do you think people will think of them as the creations of the devil or something? What if they had evolved...

http://www.imdb.com/title/tt0409847/ BOOM, you heard it right. Speilberg is making a movie with COWBOYS... and... ALIENS! What the hell? I'm pretty sure something like this was mentioned in the last chapter of the Bible. Then bad things happened.

I recently made my first blog post on the subject of whether http://reptoavian.blogspot.com/2010/08/alien-contact-forthcoming.html" . Do you agree or disagree with my estimates of the variables in the Drake equation? What do you think of my conclusions for the number and spacing between...

Ok so I was watching this history channel show called Ancient Aliens today. They had some "scientists" talking about how the pyramids were filled up with hydrogen gas which was used to shoot microwaves at a alien spaceship which would then be able to travel across the galaxy without the need of...

Do you know guys that every satelites have some note that contains all about the Earth and human? It is to inform our information to aliens. And many people tried to infrom human's culture such as music and some great pictures and a lot of languages including English. And I thought...

I'm feeling a bit shamed by the human race currently do you think I could defect to the martians? Has anyone else ever wondered if it was possible to be relocated to a planet with smart people? I mean really what did I do wrong to be stuck here with ya'll?

For a [humorous let's hope] view from Stephen Hawking on alien life, check out: http://www.timesonline.co.uk/tol/news/science/space/article7107207.ece

I was having a conversation with a friend last night, and he mentioned that he believes that aliens have come to Earth to ancient societies, helping them take actions beyond the the technological capabilities of those societies. Examples that my friend gave me were Stonehenge and pyramids...

I was trying to think how to introduce complex numbers in a more natural way. I find defining \mathrm{i}=\sqrt{-1} just to not get stuck in maths and then be surprised by the power of complex numbers unsatisfactory. There are probably other ways, but they are abstract, too? Here is some visual...

Homework Statement Imagine that space invaders could deposit extra electrons in equal amounts on the Earth and on your car, which has a mass of 1200kg. Note that the rubber tires would provide some insulation. How much charge Q would need to be placed on your car (same amount on earth) in...

Famous astronaut: - Aliens are visiting us Normally it's not a good thing to start with the conclusion, but can we in this case pre-conclude that Mitchell is just a stupid nutcase? http://www.youtube.com/watch?v=CwE0vDuTm48&feature=related (also see the rest of this Larry King show)...