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Rigorous Science

Posts tagged earth

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Q&A Is there dense, non flammable gas that I can cover the Earth in?

This question is related to Deadly, Heavier than Air Gas, and Is a world with two different types of air possible? but has several different criteria. I've also looked at https://chemistry.stackexc...

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

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Q&A How to tell if the entire Earth is just a copy?

Imagine a visiting alien accidentally spilled a bucket of inverse matter (a substance I made up just now) on the planet Earth and this stuff will annihilate with ordinary matter to produce neutrino...

4 answers  ·  posted 4y ago by user6760‭  ·  last activity 4y ago by user6760‭

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Q&A Would this dragon-rider combo be physically plausible?

Taking into account the some limitations of the square-cube law, biology, and aviation, I have tried to make a dragon-like creature and a hominid that participate in a symbiotic relationship. For ...

2 answers  ·  posted 4y ago by Cas‭  ·  last activity 4y ago by Cas‭

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Q&A How many people can live on planet Earth?

How many people can live comfortably on planet Earth, assuming that humanity reaches Kardashev scale Type I level? This implies: Energy is cheap, and available in an almost unlimited quantity, c...

5 answers  ·  posted 4y ago by pintergabor‭  ·  last activity 4y ago by pintergabor‭

Question population earth
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Rigorous Science Incoming Rogue Planet! When do we see it?

So say there was a rogue gas giant about the mass of Jupiter that, unfortunately, happened to be headed directly at Earth (or at least close enough to knock it into an orbit incompatible with life)...

2 answers  ·  posted 4y ago by Gryphon‭  ·  last activity 4y ago by Gryphon‭

Question space planets earth
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Q&A What would be the effect(s) of high-speed plasma impacting a planet?

As a follow-up to this question, what would be the effect(s) of a high-speed of super-heated plasma entering and impacting on a planet? The planet is about the size of 1.2x Earth(s), with a simila...

2 answers  ·  posted 4y ago by Hunt Castle‭  ·  last activity 4y ago by Hunt Castle‭

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Q&A How abundant could silver be in one place if given the right circumstances?

The only limiting factors are that it has to be in an area near to the ocean and to mountains (Similar distance as the Himalayas to the Bay of Bengal), and that it has to be in a hospitable place, ...

1 answer  ·  posted 4y ago by Excrafdos‭  ·  last activity 4y ago by Excrafdos‭

Question earth-like earth
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Q&A Blue soil (aka dirt) in an earth-like planet?

How could blue soil exist, in a realistic earth-like world. The world may even be earth. First off is it even possible - could soil like this exist given the requirements below? (if not then why?)...

8 answers  ·  posted 6y ago by R. Smyth‭  ·  last activity 4y ago by R. Smyth‭

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Q&A Position and Size of my Continents/Islands

its my first time posting here and i hope i do it right (watched the tour and all that). I've designed a World Map and would want to know if it looks realistic like that in terms of positioning of...

1 answer  ·  posted 4y ago by Valerian‭  ·  last activity 4y ago by Valerian‭

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Q&A Interplanetary Spore Plague(Rapture Virus)

On planet Earth, the capital of the Earth Sphere in my universe, in the year 2127, the population has increased(in density per area) by about 410%, due to the discovery of "key" bridges- traversabl...

3 answers  ·  posted 4y ago by Hunt Castle‭  ·  last activity 4y ago by Hunt Castle‭

Question earth viruses
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Q&A Perissodactylian Cetaceans

Perissodactyla is an order of mammals consisting currently of the seventeen species of horses, rhinoceroses and tapirs. Usually, any clade is connected by a coupling of genetics and physical morph...

2 answers  ·  posted 4y ago by JohnWDailey‭  ·  last activity 4y ago by JohnWDailey‭

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Q&A What do you make bricks out of in the rainforest?

Problem statement There exists a thriving Bronze Age civilization in a gigantic rainforest, bigger than the Amazon and Congo put together. This civilization is built in on the flood plains of a mi...

7 answers  ·  posted 5y ago by kingledion‭  ·  last activity 4y ago by kingledion‭

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Q&A How far should second star be in my binary system?

For a certain reason, I needed two habitable similar earth-like planets very close to each other. After various information gathering, I gave up on double planet and gas giant moons, because tidal ...

4 answers  ·  posted 4y ago by Failus Maximus‭  ·  last activity 4y ago by Failus Maximus‭

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Q&A If humans were transplanted to a different Earth-like world that they didn't evolve on, how would they deduce how they came about?

I have a world where prehistoric humans were kidnapped and transported to another world. This other world is Earth-like, with mammals (also transported from Earth then later diversifying into othe...

4 answers  ·  posted 4y ago by dsollen‭  ·  last activity 4y ago by dsollen‭

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Q&A What would we need to have 1km deep fissures spanning out across the planet?

Art by Sylvain sarrailh What kind of event would we need to have 1km deep fissures spanning out across the planet. I can work with a hypothetical scenario where the planet might have had some sor...

2 answers  ·  posted 4y ago by Sandorien‭  ·  last activity 4y ago by Sandorien‭

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Q&A What would be the effect(s) of this asteroid?

"At this very moment we face a threat insurmountable to Man. We are faced with two options. Stay on Earth and die, or leave Earth to space." - UN Preservation Council, CE 2047 Earth, year CE 2047 ...

4 answers  ·  posted 4y ago by Hunt Castle‭  ·  last activity 4y ago by Hunt Castle‭

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Q&A How do the Martians prevent salinization of their canal network

In a previous question I asked if a world similar to that envisioned in the Mars of Edgar Rice Burroughs / H G Wells could exist? And if so would canals be a practical way to make the planet habita...

2 answers  ·  posted 4y ago by Slarty‭  ·  last activity 4y ago by Slarty‭

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Q&A Ideal sun type and corresponding effects for a terrestrial planet with 256 days in a year?

The planet has 256 days in a year, split up into eight months, each with 32 days. My planet is a bit smaller than Earth: Think, enough space for the continents of Earth's western hemisphere and th...

1 answer  ·  posted 4y ago by P. M. B.‭  ·  last activity 4y ago by P. M. B.‭

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Q&A Planetizing the World of Jack and the Beanstalk: How Small is Too Small?

We all know the tale of Jack and the Beanstalk--a farmboy sells his cow for some "magic beans", which in turn grow into a mountainously tall stalk that led him to the land of a giant. Now, scienti...

3 answers  ·  posted 4y ago by JohnWDailey‭  ·  last activity 4y ago by JohnWDailey‭

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Q&A could a robot fly with powerful enough electromagnets?

The robot in question is a large, worm-like mining robot built for digging tunnels. It has electromagnets positioned throughout the segments of its body, for the purpose of pulling metals out of th...

4 answers  ·  posted 4y ago by Cobbington‭  ·  last activity 4y ago by Cobbington‭

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Q&A What would happen if the Earth was grey-gooed into paperclips?

I'm considering a scenario where Humans cannot live on Earth anymore, and need to settle other planets. Some physicist I follow on YouTube like to remind us that almost no mater what we do to Earth...

2 answers  ·  posted 4y ago by Sebastien Diot‭  ·  last activity 4y ago by Sebastien Diot‭

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Q&A What if the earth were physically split in half?

This question asks what if the world was divided into two regions? I'm asking what if the world were split into two planets. Let's say some aliens come to Earth and prank us (apparently they never...

6 answers  ·  posted 9y ago by PyRulez‭  ·  last activity 4y ago by PyRulez‭

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Q&A What sort of beak would a bone marrow eating bird have?

My world is very earthlike and I am looking to create a bird that primarily eats bone marrow. I wanted my bird to crack the bones of the carcasses to eat the marrow inside. What would the ideal bea...

4 answers  ·  posted 5y ago by bog shrimp‭  ·  last activity 4y ago by bog shrimp‭

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Q&A What to remove to make a realistic Omni-Directional Maneuver (ODM) gear?

One thing I like about Attack on Titan are those lovely Omni-Directional Maneuver (ODM) gears! They're the perfect combination of a jetpack and a grappling hook. I love how the thrusters are placed...

1 answer  ·  posted 4y ago by Mephistopheles‭  ·  last activity 4y ago by Mephistopheles‭

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Q&A Could Bear-Dogs Look and Act Like Actual Bears?

Back home, Amphicyonidae (bear-dogs) predated Ursidae by only four million years. While the latter still lives in the form of eight species, the former had been extinct for two-and-a-half million ...

1 answer  ·  posted 4y ago by JohnWDailey‭  ·  last activity 4y ago by JohnWDailey‭

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Q&A Life without a bright star?

The main source of free energy that allowed life on Earth to develop was our sun. It bombards the planet's surface with photons of high energy, which provide activation energy for reactions necessa...

2 answers  ·  posted 4y ago by Franklin Pezzuti Dyer‭  ·  last activity 4y ago by Franklin Pezzuti Dyer‭

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Q&A Are two Pangeas possible?

As we know, the Earth had one super continent at one point in the history of our planet, which eventually broke apart to become what we have today. Assuming we're talking about a planet near iden...

4 answers  ·  posted 4y ago by Sach‭  ·  last activity 4y ago by Sach‭

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Q&A Duplicate Earth and Moon, where should I put it?

Duplicate Earth and Moon, where should I put it? This question partly arises from the criticisms of stories that claim a hidden planet obscured by the sun, how it would have been detected and if s...

3 answers  ·  posted 8y ago by Jazzylee‭  ·  last activity 4y ago by Jazzylee‭

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Q&A Why would Earth be long-term unsuitable for an advanced alien species that's already colonized it?

I'm writing a story where aliens are using humanity like a botnet to do hyper complex calculations - each infested human has a program running in their subconscious brain that does a small part of ...

25 answers  ·  posted 4y ago by crass_sandwich‭  ·  last activity 4y ago by crass_sandwich‭

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Q&A Bryophitic Plants in an Underwater Forest

By "bryophitic", I mean "non-vascular land plants", being the liverworts and the mosses. (Hornworts are comparative latecomers, so we won't be talking about them.) Without vascular tissues, these...

2 answers  ·  posted 4y ago by JohnWDailey‭  ·  last activity 4y ago by JohnWDailey‭

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Q&A How many satellites would we have to launch to create an artificial set of rings around Earth

Saturn has rings of debris which orbit it, and it is possible to get a satellite into an orbit that will at least last a few years, so my question is as follows; How many satellites (or just the pu...

1 answer  ·  posted 4y ago by Bob Kerman‭  ·  last activity 4y ago by Bob Kerman‭

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Q&A Generating a Magnetic Field Biologically

I was answering this question about how a living planet-organism could be possible, and realized I didn't know how such a planet-organism could produce a magnetic field. I postulated that it could ...

6 answers  ·  posted 9y ago by DonyorM‭  ·  last activity 4y ago by DonyorM‭

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Q&A is there a way to levitating entire body of water in earth and make it stay in the sky?

as the title, is there a way to levitate entire body of water in earth and make it stay in the sky (not cloud and still in liquid form) ? either natural or man made. the water either flowing or c...

3 answers  ·  posted 4y ago by Li Jun‭  ·  last activity 4y ago by Li Jun‭

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Q&A Living on a moon with an atmosphere, how would the planet interact with the sun in the sky?

I am curious that if there were a gas giant sitting close to a red dwarf with an Earth-like satellite orbiting it: How could we determine the way the planet appears in the sky and the way it i...

1 answer  ·  posted 4y ago by Shawn‭  ·  last activity 4y ago by Shawn‭

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Q&A Could a planet have a week long day and a week long night depending on the season?

Essentially I'm looking for a plausible way that a planet could have odd, extreme seasons. Basically I'm wondering how (or if) a planet could work that has a week long day during the summer and a w...

3 answers  ·  posted 4y ago by Shawn‭  ·  last activity 4y ago by Shawn‭

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Q&A Can Mollusks Develop Bone Independently?

When one thinks of a shelled cephalopod, odds are high that the first thing to come to mind are the ammonites. They were one of evolution's success stories, thriving from 400 to 66 million years a...

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

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Q&A How To Make Earth's Oceans as Brackish as Lyr's

Allow me to present Lyr, one of a handful of worlds crafted by artist Chris Wayan: The one detail among a vast many that is important to this question is that its salinity is about 1.5%, roughly...

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

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Q&A Wolves and Hyenas--Allies For Life

In recent years, we have found evidence in the Negev Desert of the Middle East of a striped hyena, a solitary carnivoran, tagging along with a pack of wolves. This sort of alliance is found nowher...

3 answers  ·  posted 4y ago by JohnWDailey‭  ·  last activity 4y ago by JohnWDailey‭

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Q&A How large can differences in gravity be without being overly dangerous to humans?

Let's imagine a planet that is 5000 km in diameter but has the mass of the Earth. I'd imagine standing on that planet might feel similar to standing on the Earth, because the gravity would be compa...

1 answer  ·  posted 4y ago by overlord - Reinstate Monica‭  ·  last activity 4y ago by overlord - Reinstate Monica‭

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Q&A Pinniped Creodonts

Here is all you need to know about the creodonts: They were a group of carnivorous mammals that, despite having carnassials, had no relation to Carnivora. They were a global force, occupying terr...

3 answers  ·  posted 4y ago by JohnWDailey‭  ·  last activity 4y ago by JohnWDailey‭

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Q&A How long until land life can return after the impact?

So, it finally happened. The Earth was hit by a comet, and anyone outside of a research station at the bottom of the Atlantic is now dead, or dying. So, here's what we need to know: How big would a...

2 answers  ·  posted 4y ago by neutralParadox‭  ·  last activity 4y ago by neutralParadox‭

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Q&A Blocking sunlight using space debris

Can large amount space debris be used to block sunlight from falling in a particular land area (about the size of Hawaiian islands)? If so, how much space debris will be required? What will be the ...

4 answers  ·  posted 9y ago by user93‭  ·  last activity 4y ago by user93‭

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Q&A If our atmosphere was much thinner (half as thin as we have now) how would animals and humans evolve?

If our atmosphere was much thinner (half as thin as we have now) how would animals and humans evolve? Would we evolve completely different? Would we have a quite barren planet? Let's just say that ...

3 answers  ·  posted 9y ago by CrazySlayaNinjaBear‭  ·  last activity 4y ago by CrazySlayaNinjaBear‭

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Q&A Can Owl Ears Instead of Echolocation Guarantee Life in Cave Colonies?

In an alternate Earth, there are no bats. Instead, there are "flying monkeys" (which are actually lemuriform primates, rather like bushbabies or lorises.) And even though they have batlike ears, ...

2 answers  ·  posted 4y ago by JohnWDailey‭  ·  last activity 4y ago by JohnWDailey‭

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Q&A Earthquake modeling on a fictitious extraterrestrial moon

Thanks in advance for any input you can provide! I have a moon called Vieneo http://www.risetvp.com/Vieneo which has some geological modelling of faults and epicenters over some range of time: ...

2 answers  ·  posted 6y ago by Jason Reskin‭  ·  last activity 4y ago by Jason Reskin‭

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Q&A How to have habitable hollows on a planet

In the world that I am making there are hollows all over the planet, which are massive underground subterranean areas of the planet. Think The Hollow of the Gears Of War series. So far the going th...

1 answer  ·  posted 4y ago by anthony gutierrez‭  ·  last activity 4y ago by anthony gutierrez‭

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Q&A The Itsy-Bitsy Insect Has Made a Web. How Differently Would it Look From Spider Web?

In an alternate Earth, a mass extinction wiped out a percentage of the most successful phylum ever--Arthropoda. All that survived of the class Arachnida were the really small varieties--the ticks,...

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

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Q&A How to improve the speed of ancient mariners

My world is set in ancient times on a planet similar to Earth, but with a different civilization and different geography (and lots of canals). I need to find a way of giving the inhabitants better ...

3 answers  ·  posted 4y ago by Slarty‭  ·  last activity 4y ago by Slarty‭

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Q&A How would civilisation develop in a permanently psychoactive world?

How would human culture and civilisation develop if placed onto a planet permanently psychoactive, e.g. because of low (but inevitable) amount of LSD-like substance in either water or air? To simpl...

5 answers  ·  posted 8y ago by jaboja‭  ·  last activity 4y ago by jaboja‭

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Q&A How can I have an Earth-like moon?

My story takes place on the moon of a large gas giant planet. I have been trying to decide on a way for the moon to be as Earth-like as possible, but I have now decided to ask the community for hel...

2 answers  ·  posted 4y ago by overlord - Reinstate Monica‭  ·  last activity 4y ago by overlord - Reinstate Monica‭