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General Q&A about worldbuilding and other speculative developments that can be extrapolated from science.

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Activity Age Score Native Lottery
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Would a Longer PETM Save the Creodonts and the Mesonychians?

3 answers  ·  last activity 5 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 5 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 5 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?

27 answers  ·  last activity 5 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 5 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 5 months ago by ‭Matthew‭

biology
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Are firefly-like vertebrates biologically plausible?

4 answers  ·  last activity 5 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 5 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 5 months ago by ‭Alex‭

computers intelligence artificial-intelligence
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Where to place an artificial oceanic island?

1 answer  ·  last activity 5 months ago by ‭SilverCookies‭

geography megastructures gas ocean
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Weakspots of a Humanoid Iguana

3 answers  ·  last activity 5 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 5 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 5 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 5 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 5 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 5 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 5 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 5 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 5 months ago by ‭Schwefel Kamm‭

biology evolution
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Rewiring the way one views his kind

4 answers  ·  last activity 5 months ago by ‭ProjectApex‭

psychology
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How much volume does a liquefied human take?

8 answers  ·  last activity 5 months ago by ‭Seraphim‭

biology mathematics
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Superhuman: Extreme Temperatures Pt.2

1 answer  ·  last activity 5 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 °F?

1 answer  ·  last activity 5 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 5 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 5 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 5 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 5 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 5 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 5 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 5 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 5 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 5 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 5 months ago by ‭Mephistopheles‭

science-based underground architecture engineering
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Specific gravity change for my world

0 answers  ·  last activity 5 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 5 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 5 months ago by ‭The Humbug‭

biology science-based creature-design xenobiology
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Is my planet realistic?

4 answers  ·  last activity 5 months ago by ‭LonelyCryptid‭

reality-check planets solar-system
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Humanity is doomed because of succubi

2 answers  ·  last activity 5 months ago by ‭Kay‭

evolution humans survival
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Creature that increases its own lifespan by killing other animals

1 answer  ·  last activity 5 months ago by ‭Kay‭

reality-check creature-design immortality anatomy anatomically-correct
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What might cause a civilization to be unable to colonize a large moon but live in space stations around it instead?

25 answers  ·  last activity 5 months ago by ‭Topcode‭

space science-based moons colonization space-colonization
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Net shift of humans towards introversion?

2 answers  ·  last activity 5 months ago by ‭subdermatoglyphic‭

reality-check society science-based psychology humans
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What is the tallest mountain possible in any gravitational environment?

2 answers  ·  last activity 5 months ago by ‭Slarty‭

planets science-based physics gravity alternate-worlds
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What laws of physics would need to be broken in order to travel in space faster?

4 answers  ·  last activity 5 months ago by ‭LukeN‭

space travel science-based spaceships space-travel ships science-fiction
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What events would trigger linguistic hyper-evolution in a spacefaring civilisation?

1 answer  ·  last activity 5 months ago by ‭System‭

science-based language
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The most suitable martial art for birdpeople?

6 answers  ·  last activity 5 months ago by ‭Mephistopheles‭

science-based martial-arts
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How much energy would be needed for a sentient plant species

1 answer  ·  last activity 5 months ago by ‭RotNDecay‭

reality-check science-based flora
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Would it be possible to build numerous spaceships that could transport 10 million people in the late 2100's?

2 answers  ·  last activity 5 months ago by ‭Niobium_Sage‭

space travel reality-check spaceships space-travel food space-constructs ships
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Binary Star System Build - Alpha Centauri

1 answer  ·  last activity 5 months ago by ‭user72655‭

space planets science-based orbital-mechanics solar-system
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What binary poisons could work when ingested?

5 answers  ·  last activity 5 months ago by ‭Mais‭

science-based chemistry poisons low-fantasy
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Could a "multicellular" virus exist?

6 answers  ·  last activity 5 months ago by ‭Topcode‭

reality-check science-based fauna creature-design viruses
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