Scientific Speculation

50%

+0 −0

Can mercury compounds be used in chemosynthesis?

1 answer · posted over 1 year ago by pg4919‭ · last activity over 1 year ago by pg4919‭

biology reality-check creature-design chemistry biochemistry

50%

+0 −0

Evolutionary adaptations in sensory organs among wildlife in sandstorm?

1 answer · posted over 1 year ago by Delirium‭ · last activity over 1 year ago by Delirium‭

biology evolution aliens xenobiology

50%

+0 −0

How would the Politburo respond to Project A119?

3 answers · posted over 1 year ago by Jem‭ · last activity over 1 year ago by Jem‭

space alternate-history history nuclear

50%

+0 −0

What would days and nights look like on this cylindrical world?

4 answers · posted over 1 year ago by Yuriy S‭ · last activity over 1 year ago by Yuriy S‭

day-night alternate-worlds nonspherical-worlds

50%

+0 −0

What's it like to be an uploaded human with limited computing power?

10 answers · posted over 1 year ago by lirtosiast‭ · last activity over 1 year ago by lirtosiast‭

simulation

50%

+0 −0

How can a massive ship be partially destroyed in reentry, but have the top part still intact?

7 answers · posted over 1 year ago by Topcode‭ · last activity over 1 year ago by Topcode‭

space travel spaceships space-travel ships re-entry

50%

+0 −0

What adaptations would a tree need to survive an area with monthly fires?

3 answers · posted over 1 year ago by chase leffers‭ · last activity over 1 year ago by chase leffers‭

biology flora science-fiction

50%

+0 −0

Is it possible for a moon to stay on the same side of its planet relative to the sun?

3 answers · posted over 1 year ago by LonelyCryptid‭ · last activity over 1 year ago by LonelyCryptid‭

earth-like reality-check moons orbital-mechanics earth gas-giants gas

50%

+0 −0

The economics of laser sails vs fusion rockets

4 answers · posted almost 2 years ago by Adam Reynolds‭ · last activity over 1 year ago by Adam Reynolds‭

space travel space-travel economy

50%

+0 −0

Artificial oxygen oasis in an otherwise CO2 atmosphere

3 answers · posted over 1 year ago by Anixx‭ · last activity over 1 year ago by Anixx‭

space atmosphere terraforming colonization space-colonization engineering

50%

+0 −0

How do my plants trap so much carbon?

3 answers · posted almost 2 years ago by Aezyc‭ · last activity over 1 year ago by Aezyc‭

environment biology chemistry xenobiology biochemistry plant-design carbon-based

50%

+0 −0

Adopting a new calendar for a multi-generational space journey [Generations Novel]

3 answers · posted over 1 year ago by Noam Josephides‭ · last activity over 1 year ago by Noam Josephides‭

physics science-fiction

50%

+0 −0

What is the best form of powered vehicular flight within a McKendree habitat?

3 answers · posted over 1 year ago by rek‭ · last activity over 1 year ago by rek‭

flight megastructures light gas science-fiction vehicles

50%

+0 −0

Euro-American Maglev Railway - Transit without stopping

9 answers · posted over 1 year ago by Prahara‭ · last activity over 1 year ago by Prahara‭

transportation transport

50%

+0 −0

What could some alternative eating utensils be like?

17 answers · posted almost 2 years ago by Jester Gleeful‭ · last activity over 1 year ago by Jester Gleeful‭

culture technology food tools

50%

+0 −0

Spacewalking in 0.3c - is it feasible? [Generations novel]

6 answers · posted over 1 year ago by Noam Josephides‭ · last activity over 1 year ago by Noam Josephides‭

biology physics

50%

+0 −0

Advantages of Bowlegs in Humanoid Species

1 answer · posted almost 2 years ago by bio‭ · last activity over 1 year ago by bio‭

evolution bones anatomy

50%

+0 −0

How can a rogue planet get energy for plants to use?

8 answers · posted over 1 year ago by Chickenpeep Chickenpeep‭ · last activity over 1 year ago by Chickenpeep Chickenpeep‭

planets flora energy

50%

+0 −0

How can my dragons follow your movement with their eyes?

6 answers · posted over 1 year ago by Mephistopheles‭ · last activity over 1 year ago by Mephistopheles‭

biology creature-design dragons optics

50%

+0 −0

Why are my caves warm with nobody heating them?

7 answers · posted over 1 year ago by MechMK1‭ · last activity over 1 year ago by MechMK1‭

geography temperature

50%

+0 −0

What does a timeflow-doubled superhero see?

2 answers · posted over 1 year ago by Foo Bar‭ · last activity over 1 year ago by Foo Bar‭

time super-powers vision time-manipulation

50%

+0 −0

Is there a plausible way to have a Gas Giant with two or more earth to mars sized moons orbiting it in the Habitable zone?

2 answers · posted over 1 year ago by Khwarezm‭ · last activity over 1 year ago by Khwarezm‭

astronomy planets moons

50%

+0 −0

Space station scenario feasibility

4 answers · posted over 1 year ago by Prahara‭ · last activity over 1 year ago by Prahara‭

space reality-check space-constructs

50%

+0 −0

Is knuckle walking possible in a cursorial animal?

2 answers · posted almost 2 years ago by ProjectApex‭ · last activity over 1 year ago by ProjectApex‭

biology evolution creature-design xenobiology

50%

+0 −0

Augmentations - Jumping high!

5 answers · posted over 1 year ago by Prahara‭ · last activity over 1 year ago by Prahara‭

biology cybernetics

50%

+0 −0

How would a biological brain be updated with its digital memory?

3 answers · posted over 1 year ago by RandySavage‭ · last activity over 1 year ago by RandySavage‭

biology brain virtual-reality

50%

+0 −0

Weather and climate of Massive Grass Plains?

3 answers · posted over 1 year ago by Gray9‭ · last activity over 1 year ago by Gray9‭

weather geography

50%

+0 −0

Reasonably tougher humans against falls, concussions etc

2 answers · posted over 1 year ago by Blirk‭ · last activity over 1 year ago by Blirk‭

biology humans bones bio-mechanics

50%

+0 −0

Exploring a world with chiral biochemistry: chirality detection

2 answers · posted over 1 year ago by L.Dutch - Reinstate Monica‭ · last activity over 1 year ago by L.Dutch - Reinstate Monica‭

earth exploration chemistry biochemistry alternate-earth

50%

+0 −0

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

1 answer · posted almost 2 years ago by Space_Cadet‭ · last activity over 1 year ago by Space_Cadet‭

climate atmosphere sunlight light

50%

+0 −0

Space-based black hole weapon effects

6 answers · posted over 1 year ago by Demigan‭ · last activity over 1 year ago by Demigan‭

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

50%

+0 −0

Infinite endurance

6 answers · posted over 1 year ago by Kyu‭ · last activity over 1 year ago by Kyu‭

reality-check creature-design

50%

+0 −0

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

3 answers · posted over 1 year ago by Incognito‭ · last activity over 1 year ago by Incognito‭

biology reality-check

50%

+0 −0

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

1 answer · posted over 1 year ago by TheDyingOfLight‭ · last activity over 1 year ago by TheDyingOfLight‭

water physics underwater ocean

50%

+0 −0

Making Immobile carnivore

1 answer · posted over 1 year ago by RotNDecay‭ · last activity over 1 year ago by RotNDecay‭

biology evolution

50%

+0 −0

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

1 answer · posted over 1 year ago by TheDyingOfLight‭ · last activity over 1 year ago by TheDyingOfLight‭

physics geology ocean astrophysics

50%

+0 −0

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

1 answer · posted over 1 year ago by Cascader‭ · last activity over 1 year ago by Cascader‭

reality-check natural-disasters meteor

50%

+0 −0

Treating Postpartum Depression when Reproductive Mortality is ~100%?

2 answers · posted over 1 year ago by Logan R. Kearsley‭ · last activity over 1 year ago by Logan R. Kearsley‭

psychology aliens

50%

+0 −0

Would an obligate carnivore eat bread/grain?

4 answers · posted over 1 year ago by Matthew‭ · last activity over 1 year ago by Matthew‭

biology food

50%

+0 −0

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

1 answer · posted over 1 year ago by guest‭ · last activity over 1 year ago by guest‭

50%

+0 −0

Inducing hallucinations to attract prey

2 answers · posted over 1 year ago by Kyu‭ · last activity over 1 year ago by Kyu‭

reality-check creature-design

50%

+0 −0

Would a Longer PETM Save the Creodonts and the Mesonychians?

3 answers · posted over 1 year ago by JohnWDailey‭ · last activity over 1 year ago by JohnWDailey‭

evolution adaptability earth alternate-history history mammals alternate-earth

50%

+0 −0

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

4 answers · posted over 1 year ago by Faz‭ · last activity over 1 year ago by Faz‭

planets scientific-development exploration

50%

+0 −0

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

4 answers · posted over 1 year ago by Popplio Lover‭ · last activity over 1 year ago by Popplio Lover‭

biology evolution humans genetics

50%

+0 −0

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

26 answers · posted over 1 year ago by Alex‭ · last activity over 1 year ago by Alex‭

50%

+0 −0

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

3 answers · posted over 1 year ago by chaeltom‭ · last activity over 1 year ago by chaeltom‭

environment climate planets flora climate-change

50%

+0 −0

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

7 answers · posted over 1 year ago by Matthew‭ · last activity over 1 year ago by Matthew‭

biology

50%

+0 −0

Are firefly-like vertebrates biologically plausible?

4 answers · posted over 1 year ago by user3556983‭ · last activity over 1 year ago by user3556983‭

biology creature-design zoology

50%

+0 −0

Temperatures on an Earth with a week-long rotational period

2 answers · posted over 1 year ago by Ryan Williamson‭ · last activity over 1 year ago by Ryan Williamson‭

climate reality-check planets

50%

+0 −0

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

1 answer · posted over 1 year ago by Alex‭ · last activity over 1 year ago by Alex‭

computers intelligence artificial-intelligence

Communities