Scientific Speculation

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An Earth with a permanent winter state with drastically reduced temperature, dark skies and mass extinctions

1 answer · last activity 9 months ago by Space_Cadet‭

climate atmosphere sunlight light

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Space-based black hole weapon effects

6 answers · last activity 9 months ago by Demigan‭

reality-check science-based black-holes weapon-mass-destruction science-fiction

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Infinite endurance

6 answers · last activity 9 months ago by Kyu‭

reality-check science-based creature-design

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How can a powerful acidic substance not break down inorganic material?

3 answers · last activity 9 months ago by Incognito‭

biology reality-check

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A Seafloor of Ice and Rock: Ice VI / Water Boundary

1 answer · last activity 9 months ago by TheDyingOfLight‭

water physics underwater ocean

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Making Immobile carnivore

1 answer · last activity 9 months ago by RotNDecay‭

biology evolution science-based

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How deep can the oceans be while still alowing some land?

1 answer · last activity 9 months ago by TheDyingOfLight‭

physics geology ocean astrophysics

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Are large meteor craters possible with the survival of most human society?

1 answer · last activity 9 months ago by Cascader‭

reality-check science-based natural-disasters meteor

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Treating Postpartum Depression when Reproductive Mortality is ~100%?

2 answers · last activity 9 months ago by Logan R. Kearsley‭

psychology aliens

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Would an obligate carnivore eat bread/grain?

4 answers · last activity 9 months ago by Matthew‭

biology food

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How long would the St. Louis arch stand if humanity vanished from the earth, tomorrow?

1 answer · last activity 9 months ago by guest‭

science-based

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Inducing hallucinations to attract prey

2 answers · last activity 9 months ago by Kyu‭

reality-check science-based creature-design

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Would a Longer PETM Save the Creodonts and the Mesonychians?

3 answers · last activity 9 months ago by JohnWDailey‭

evolution adaptability earth alternate-history history mammals alternate-earth

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Putting together a research expedition to an alien planet - what kind of scientists am I taking with me?

4 answers · last activity 9 months ago by Faz‭

planets scientific-development exploration

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How small can I make this character without making it too weird?

4 answers · last activity 9 months ago by Popplio Lover‭

biology evolution humans genetics

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How could a civilization stay at a medieval tech level for millions of years?

26 answers · last activity 9 months ago by Alex‭

science-based

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When earth is filled to the brim with plant-life, can it cause a hyperoxic environment?

3 answers · last activity 9 months ago by chaeltom‭

environment climate planets flora climate-change

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How "young" can a non-aging person be and still function?

7 answers · last activity 9 months ago by Matthew‭

biology

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Are firefly-like vertebrates biologically plausible?

4 answers · last activity 9 months ago by user3556983‭

biology science-based creature-design zoology

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Temperatures on an Earth with a week-long rotational period

2 answers · last activity 9 months ago by Ryan Williamson‭

climate reality-check planets

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How could two AIs "battle" within a closed off computer?

1 answer · last activity 9 months ago by Alex‭

computers intelligence artificial-intelligence

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Where to place an artificial oceanic island?

1 answer · last activity 9 months ago by SilverCookies‭

geography megastructures gas ocean

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Weakspots of a Humanoid Iguana

3 answers · last activity 9 months ago by sjzjjdjdjsn‭

science-based creature-design reptiles science-fiction anatomically-correct

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Online Anatomy Creator/Maker..?

2 answers · last activity 9 months ago by WhimsyDoesIt‭

creature-design software-recommendations anatomy

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how big does my creature's organ need to blind or stun predator of all size?

4 answers · last activity 9 months ago by user3556983‭

evolution creature-design sea light sea-creatures zoology

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Could my "erect penguins" exist?

1 answer · last activity 9 months ago by icewar1908‭

biology evolution science-based creature-design

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What if we created a race of humans specialized for islands?

3 answers · last activity 9 months ago by Popplio Lover‭

biology evolution humans creature-design

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Would it make sense to send potential human colonists on the initial manned expedition to a habitable, Earth-like planet?

5 answers · last activity 9 months ago by Space_Cadet‭

space travel planets space-travel colonization space-colonization

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What if we created a race of humans specialized for a tundra biome?

1 answer · last activity 9 months ago by Popplio Lover‭

biology evolution humans creature-design

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How would someone actively search for titanium ores or other minerals?

4 answers · last activity 9 months ago by Wayward Astronaut‭

technology chemistry mining

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Could the common housefly survive on a diet of various grasses? If not, whats the minimum amount of other species they would need to survive?

1 answer · last activity 9 months ago by Schwefel Kamm‭

biology evolution

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Rewiring the way one views his kind

4 answers · last activity 9 months ago by ProjectApex‭

psychology

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How much volume does a liquefied human take?

8 answers · last activity 9 months ago by Seraphim‭

biology mathematics

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Superhuman: Extreme Temperatures Pt.2

1 answer · last activity 9 months ago by WhimsyDoesIt‭

biology temperature super-powers bio-mechanics body-modification

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What would it take to get the temperature of the human body to rise to 3,000 Â°F?

1 answer · last activity 9 months ago by WhimsyDoesIt‭

biology temperature super-powers bio-mechanics body-modification

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Where would a technologically advanced group of people forced into space by a calamity obtain water from?

7 answers · last activity 9 months ago by Niobium_Sage‭

space travel water space-travel food colonization space-colonization shipbuilding

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What will the abdominal muscles of non-primate humanoids look like?

2 answers · last activity 9 months ago by Pierre ‭

biology reality-check evolution science-based

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What percentage of stars would need to become Shkadov thrusters to move the whole galaxy?

1 answer · last activity 9 months ago by RandySavage‭

space gravity megastructures gas galactic

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Would would occur if a person travelled from a wormhole in flat empty space, to one on Earth?

1 answer · last activity 9 months ago by MrKred‭

space travel space-travel wormholes interstellar-travel interstellar

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What is the force of impact for a failing space elevator given the following conditions?

2 answers · last activity 9 months ago by MUSE-42‭

space science-based technology space-constructs space-elevators

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How would one detect a black hole when there are no more light sources for it to refract?

5 answers · last activity 9 months ago by In the name of the story‭

space travel spaceships space-travel black-holes ships science-fiction

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Is the existence of vertically shaped pupils, with a hawk eyesight, biologically possible?

1 answer · last activity 9 months ago by Mike‭

biology races fantasy-races

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I want ten Earth-years long day on my planet. Can I have it?

6 answers · last activity 9 months ago by Zjerzy‭

climate planets day-night orbital-mechanics

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Why would a sleeper ship be designed to only wake one person in case of emergency?

36 answers · last activity 9 months ago by Joe Bloggs‭

space travel space-travel colonization cryogenics

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How can I make the supporting pillars of an underground city less obstructive?

22 answers · last activity 9 months ago by Mephistopheles‭

science-based underground architecture engineering

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Specific gravity change for my world

0 answers · last activity 9 months ago by NRJohnson‭

gravity mathematics science-fiction

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Are there *plausible* planetary conditions where jet aircraft just don't have much advantage over propeller-driven aircraft?

2 answers · last activity 9 months ago by Tristan Klassen‭

atmosphere science-based vehicles

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Plausibility of a six limbed, four legged giant

2 answers · last activity 9 months ago by The Humbug‭

biology science-based creature-design xenobiology

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Is my planet realistic?

4 answers · last activity 9 months ago by LonelyCryptid‭

reality-check planets solar-system

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Humanity is doomed because of succubi

2 answers · last activity 9 months ago by Kay‭

evolution humans survival

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