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13.1k posts
 
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Q&A Whale-Tail and Seal-Legs in One Animal

In marine mammals, there are two different body types for two different niches: A long, strong tail for all-marine whales... ...and all four legs modified into flippers for pinnipeds that fee...

3 answers  ·  posted 6y ago by JohnWDailey‭  ·  last activity 6y ago by JohnWDailey‭

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Q&A Practical height of towers without elevators

I'm writing about a setting where building technology is quite advanced, but elevators have not yet been invented, so the limiting factor on height is ergonomic. What would be the maximum practica...

6 answers  ·  posted 6y ago by rwallace‭  ·  last activity 6y ago by rwallace‭

Question humans construction
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Q&A What are some plausible formation explanations of a non-hot "Fluffy" Gas Giant planet?

So, in my research and preparation for the question I asked immediately before this one, I was introduced to the concept of "fluffy" gas giants, gas giants with significantly lower density than wou...

2 answers  ·  posted 6y ago by Dalila‭  ·  last activity 6y ago by Dalila‭

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Q&A Survival of Eukaryotic Life in Stagnant Oceans

I was trying to figure out the early geological/biological history of the world I'm creating, and I was wondering about the development of early life. Basically, I've envisioned a world where Eukar...

2 answers  ·  posted 6y ago by N Francis‭  ·  last activity 6y ago by N Francis‭

Question biology geology
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Q&A Why do shapeshifters not kill their doubles before taking their form?

Ko'dor are an octopus like species that arise from the swamps of the planet Luvwa. They have the ability to transform their bodies into any form or shape they want. When a Ko'dor wants to infiltr...

6 answers  ·  posted 6y ago by DT Cooper‭  ·  last activity 6y ago by DT Cooper‭

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Q&A Mega-Dandelion Seed Size

How large, referring to weight, could a Dandelion seed become before the wind was no longer able to carry them away? Assume the physiology of both the seed and plant remain the same besides being s...

1 answer  ·  posted 6y ago by Thalassan‭  ·  last activity 6y ago by Thalassan‭

Question biology flora
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Q&A Would Earth plants grow in an alien environment?

This is a second question about the same world described in this question about human reaction to an alien world. So here's the idea: human beings travel to and land on an Earth-like world with th...

2 answers  ·  posted 6y ago by Kryten‭  ·  last activity 6y ago by Kryten‭

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Q&A How to transmit energy through rock and store it in crystals?

I have created a species that is basically a sort of land coral covered in a thick carapace made of rock. They live on an Earth-like planet (Class M as they say in Star Trek) and behave like cora...

3 answers  ·  posted 6y ago by Sava‭  ·  last activity 6y ago by Sava‭

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Q&A The Hadean Explosion?

In recent years, the search for the origins of life is becoming complex. It turns out that oxygen is NOT a requirement for multicellular life to thrive. As stated in this BBC article, poriferans ...

4 answers  ·  posted 6y ago by JohnWDailey‭  ·  last activity 5y ago by JohnWDailey‭

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Q&A Powerful race breeding a better human

So some magical human-like creatures called Altum come from another continent (in my book) to this human populated continent (both are about the size of Europe). They want to help humans become a b...

5 answers  ·  posted 6y ago by user55812‭  ·  last activity 6y ago by user55812‭

Question biology humans
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Q&A Producing oxygen without plants

Obviously, current oxygen levels should last us years, so we are talking about a long-term solution. Also, in this hypothetical scenario, plants have stopped releasing oxygen but haven't stop prod...

6 answers  ·  posted 6y ago by A.V. Arno‭  ·  last activity 6y ago by A.V. Arno‭

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Q&A What kind of impact could strip Venus and make it spin faster?

I'm trying to create plausible scenario under which we could colonize Venus. Is it possible that Venus could be hit by a planetoid and the impact strips its atmosphere and makes it spin faster? ...

1 answer  ·  posted 6y ago by Arista‭  ·  last activity 6y ago by Arista‭

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Q&A Why would post-apocalyptic men be twice as large as women?

I'm creating a post-apocalyptic world several centuries into the future. After the nuclear war whatever is left of humanity has regressed into the dark age. Society: The offspring of those few w...

14 answers  ·  posted 6y ago by NewDawn‭  ·  last activity 6y ago by NewDawn‭

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Q&A Sea pumps to create rain using windmills to control weather?

I'd love some science advice and facts for this question: If they use wind power to bring up water from the ocean in the day time and spray it on prevailing winds going into land (i.e. 10-15 km fr...

4 answers  ·  posted 6y ago by com.prehensible‭  ·  last activity 5y ago by com.prehensible‭

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Q&A Oil-eating animal; possible?

I saw a movie where oil companies stumbled upon these fictional underground aquatic deep-sea animals that survived on eating and digesting the oil where they lived. They had squid/octopus-like bodi...

4 answers  ·  posted 6y ago by user55812‭  ·  last activity 6y ago by user55812‭

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Q&A How do the aliens maintain their transformations, even after they die?

So, in my story there is a species of aliens, called the Ko'dor. The Ko'dor are a species of shape-shifters, who can change their forms at will. Naturally, they are four-eyed, green octopus like cr...

4 answers  ·  posted 6y ago by DT Cooper‭  ·  last activity 6y ago by DT Cooper‭

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Q&A Would carbon fiber be a good choice to strengthen human bones, and how would that work?

Background Hi all, I'm revisiting my musings on plausibly strengthening the human skeleton to better withstand the stresses of combat, melee in particular. If y'all don't care about background, sk...

4 answers  ·  posted 6y ago by Horik‭  ·  last activity 6y ago by Horik‭

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Q&A Are there any plausible 'alternative' methods of planetary formation?

The selected answer on this question provides an extremely good, and detailed, description of what is generally accepted to be the main (only?) way a terrestrial planet can form, i.e. through accre...

3 answers  ·  posted 6y ago by Dalila‭  ·  last activity 6y ago by Dalila‭

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Q&A Alternative origins for the lungs

The terrestrial "vertebrates" of my planet must breathe air, and therefore must have lungs of some kind. They are descended from fish-like creatures, which breathe through gills. However, I would ...

1 answer  ·  posted 6y ago by SealBoi‭  ·  last activity 6y ago by SealBoi‭

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Q&A Shrinking people and objects - what physics could accomplish this?

Popular science fiction is full of examples of people and objects being shrunk down to the size of insects or smaller. Let us assume that everything is shrunk. Thus an animal would still contain t...

3 answers  ·  posted 6y ago by chasly from UK‭  ·  last activity 6y ago by chasly from UK‭

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Q&A weather after the earth gets flooded

tl;dr : the earth has been gradually flooded, over the course of a few hundred years. Also, there are now large lumps or ice raining out of the sky (not very often), causing massive tsunamis. I ha...

1 answer  ·  posted 6y ago by Mark Gardner‭  ·  last activity 6y ago by Mark Gardner‭

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Q&A Requesting help with physiological merfolk concept

The concept I have is merfolk that don't breath underwater and preserve a very human appearance from the waist up. I need to keep human (or at least very human-like) hair, skin, and eyesight in...

2 answers  ·  posted 6y ago by Flarion‭  ·  last activity 6y ago by Flarion‭

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Q&A Would Rayleigh scattering (blue skies) be noticeable in an O'Neill cylinder?

In my story there is a full size (Island Three) O'Neill cylinder, 5 miles in diameter and 20 miles long. It doesn't have windows, but is lit internally down the center of the cylinder with a 20 mi...

1 answer  ·  posted 6y ago by Sam Washburn‭  ·  last activity 6y ago by Sam Washburn‭

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Q&A Feasibility of Bipedal Chelonians

I'm creating a creature that possesses an outwardly Chelonian-like appearance. However, the creature is bipedal. Specifically, the creature possesses upright, pillar-like hind limbs, as well as a K...

3 answers  ·  posted 6y ago by N Francis‭  ·  last activity 6y ago by N Francis‭

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Q&A How can an entire continent be concealed from the rest of the world?

Basically, it's a continent that wants to be really hard to find (you can find it if you try really, really hard). For example, if you got in a ship and wanted to sail to it you wouldn't be able to...

9 answers  ·  posted 6y ago by Enny‭  ·  last activity 6y ago by Enny‭

Question geography