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Preservation: Grey goo in any of it's forms does what it does - destroys everything it comes in contact with. It makes more grey goo. Now grey goo is nice, but we all know what happened to king Midas when he wanted everything to be gold - the things he really valued were destroyed. Grey goo as a WMD is only useful to destroy everything you point it at. But ...

30

Why We Would Hunt Them Humans never tolerate a against our most vulnerable population. Throughout human history we have attempted to exterminate many dangerous animals simply because they are dangerous. Wolves, snakes, bears, etc. While these animals are dangerous to hunt, it is far more dangerous to allow them to freely cohabitate with us and risk having ...

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Because we don't know about its past and the ordering system is not as straightforward as it seems. Before anything, I'd like to say that these drones seem to function a lot like ants. They clearly function more like a superorganism, in the sense that they act more like the cells of an individual organism than as a group of individual entities, especially ...

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Thankfully most of that does not really matter, Its fairly simple you only need two things for a rough estimate. Body mass and metabolism work with kleiber's law for a quick estimate. Body mass is fairly straight forward, base metabolism depends on how accurate you need the estimate, you can break it down by species, clade, or type of metabolism. for a quick ...

15

Jump jewel. https://medium.com/here-there-be-monsters/the-monster-with-a-jewel-in-its-head-efae13f86ede https://en.wikipedia.org/wiki/Guivre Guivres are also well known as vouivres, and the terms have become synonymous. For example, in The Drac: French Tales of Dragons and Demons, the vouivre is depicted as a female creature with dazzling, green scales ...

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Adaptation This swarm was used for that purpose, but strong targets found ways to disrupt communications between drones, preventing them from recognising each other. Each drone had to fall back to a basic pattern: Find material, build replica. So they wasted their time devouring each other. Disruptors require testing and development. Keeping the swarm doing ...

10

The gravity of the situation presents danger. NO seriously, you have trillions, capable of further doubling every couple minutes, and they are each the size of a rhinoceros, and mass about 3.5 tonnes? Just how much gravity does a 3.5 trillion ton swarm present? Or how about one that has replicated itself for just one hour, and now masses 52 times as much as ...

9

We trust this swarm, we aren't worried about it going rogue. Maybe you should be. The 9000 series is the most reliable computer ever made. No 9000 computer has ever made a mistake or distorted information. We are all, by any practical definition of the words, foolproof and incapable of error. -HAL 9000 on itself Value drift The Grey goo is intelligent, ...

9

Where is the pride of the hunter if not in the size and difficulty of the prey? Have you ever heard anybody bragging about of challenging was to hunt a sparrow or a mouse? No, you ear stories about hunting a lion, a hippo, a grizzly, a moose, a whale, all sort of big animals which don't give up their life easily. The way you describe the creature it looks ...

8

Tonne-per-Tonne, Ships are Stronger. In your universe, combat power increases exponentially with size. This is likely do to efficiencies in power or shield generation at scale. Imagine 100 U of resources. When used for a single ship, it makes 100 U of destructive power, but when used with 100 ships, it makes 10 U of destructive power. The difference is so ...

8

Escalation and the Rules of War Certain powerful alien species like to consider themselves universal police and step in when inferior species start to mess around with truly dangerous stuff like grey-goo, vacuum decay, or time travel. While limited use of these technologies is fine, they don't like to see it used as an opening salvo to a war, instead ...

8

Yes its possible. there are no placental mammals with beaks but that does not mean much, there are no crocodiles, snakes, or amphibians with beaks either. Beaks evolved several times so they can't be that hard, and structurally they are fairly simple and utilize materials mammals produce. Beaks are lighter but also less effective than teeth. Beaks may have ...

8

Why humans should kill this space creature Because They can detect ships heat from 10k km and they are very aggressive (no one know why). They attacks ships crushing theirs bodies against and shaping theirs bodies in ways they can pierce the hull or detach pieces of the ship. I don't know about you, but if I had a load of spice jeopardized because of some ...

6

You can easily get 5 atmospheres of pressure in an earthlike environment. https://www.girlsthatscuba.com/advanced-open-water-course/ She is producing 5 atmospheres of pressure between her hands. And she is strong but not super strong. It is very earthlike there because she is off the coast of Indonesia. Actually there are 5 atmospheres of pressure all ...

5

They are not plausible There's a lot that makes this build troublesome. First is obvious. Hygiene. Things from the top go down. Some creatures are build to be strong against these things, but it does require energy and a special evolution to get this. Just having it go down your body, not even to your head, can be dangerous. Even without cuts or damages it ...

5

Cob = Roach found almost exclusively in undisturbed places Some species of roach prefer undisturbed places, since places that are disturbed frequently are places where a predator or human is more likely to find them and kill them. So, check. mostly abandoned buildings. Number one reason I don't hang around abandoned buildings, more than the collapsing ...

5

It cannot Although it isn't impossible for a humanoid to have quadrupedal movement, see lots of monkeys, the human form is very unfriendly for quadrupedal movement. The inefficiencies come from the way the arms and legs are build, of which their length is one of the limiting factors. It is simply not an efficient way to move. As the restrictions also tell of ...

4

Your alien species is one of intelligent, modular, colonial, biodemocrat organisms! The individuals of your alien species aren't discrete beings at all - instead, they are giant colonies of individual smart organisms that bundle together to "create" an working unit. Those units are highly cohesive and specialized but able to work alone in case of ...

4

I second what both individuals already said. The tail as it exist now doesn't make sense. I won't repeat what was already stated by others in this regard. Instead I'll nitpick about everything else! Though before I go out of my way to criticize everything let me say that most of it isn't that big a deal. That is to say that while I don't think this ...

4

What is the Motivation? To answer this question, we need to understand a lot more about what motivates the creatures with this body plan + Eyes. You don't tell us anything about the individual species, what they eat, where they live, or what eats them. I'll assume you want us to create species that look like this. The reasons are as diverse as the motives ...

4

Adaptation to predation. The "earthworm-a-likes" are adapted to survive predation from above (voles, birds even the occasional fox). The knack to this is to look dark against the dark soil beneath them (it presupposes that they spend time on the surface during the day - perhaps like real earthworms when it rains, they come to the surface to avoid ...

4

Any animals with classical shapes as we know them could probably not grow much larger than the blue whale in water, or the largest dinosaurs on land. That's because those creatures are/were already pushing the envelope when it comes to the Square-Cube law. You can't put a city block atop a blue whale, and I am tempted to stop here and just leave a quote from ...

4

Bat and bird diets are largely the same once mature, but a beak would make suckling quite difficult if not impossible for newborns. The only way around this I can see is a structure with a pronounced gap in the middle that closes once weaned. But why would bats evolve beaks? They would need to specialize in a type of food they can't access otherwise: wood ...

4

This question very seductively tempts someone to answer how day-night cycles of a rotating planet would always be equal. With a tilt of an axis closer to the poles there would be periods of the year with longer night but only with other seasons of the year with more daylight. For your premise you need to have a reason why light shines on only 40% of the ...

4

From Wikipedia: Parthenogenesis in birds is known mainly from studies of domesticated turkeys and chickens, although it has also been noted in the domestic pigeon. In most cases the egg fails to develop normally or completely to hatching. The first description of parthenogenetic development in a passerine was demonstrated in captive zebra finches, although ...

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tl;dr Physics says: it's possible if you are a machine that can withstand extreme temperatures or pressures. Biology just says nope not within a window that can support any life. How it came to that... $$PV=nRT$$ That's the gas law. You want to get CO2 to go liquid. You assert that's at 5.5 atmospheres1. Or 557288 Pa. Let's assume that we want to compress 1 ...

4

Nukes can stop them. Targeted nuclear strikes can destroy them before they can mass replicate, and any experienced enemy has either nukes or something similar. Using grey goo tends to be ineffective and ruins biospheres. As such, it isn't used until all nuclear powers have been defeated. Once the grey goo has reached enough mass it can produce large shields ...

4

the same as a human torso I'm assuming you want the living life-support machine to support an average human. This organic machine would take over 100% of the functions. So I'm disregarding things like too small arteries for full blood circulation. Biology is generally created in it's smallest size that remains practical. A full heart, full lungs and all the ...

4

It is an aquatic creature. Its "wings" are fins. It moves over slick surfaces like a penguin. If it cant slide it can stand up and waddle along. https://www.youtube.com/watch?v=tKPv_2hicY0 The long tail is helpful steering. "All males" is because males are the dispersal phase, as is the case for a lot of vertebrates. They are looking ...

4

It depends on what you need them to be able to do. Do they need to be able to produce sounds that are intelligible to someone that knows only English? Well, that might be difficult. If they just need to be able to produce something that a) can serve as a complex language, and b) that a human could conceivably learn to understand (but not necessarily speak ...

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