Questions tagged [science-based]

For questions that require answers based on hard science, not magic or pseudo-science, but do not require scientific citations. Contrast with the hard-science and reality-check tags. Do not use this tag as the only tag on a question because it describes how the question should be answered, not the topic.

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What is the biggest possible size a boned sea creature could get?

On a planet like the earth with its same gravity and ecosystem what is the biggest a boney sea creature could get both in terms of size and weight. I don't mean biologically but literally, since this ...
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112 views

Largest possible biomass on any given exoplanet

Suppose you are the hypothetical architect of a new exoplanet, who's been handed the job to maximize this exoplanet's biomass. Given the current knowledge of life as it is, and thus leaving any sort ...
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1answer
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Molecular ecology for endogenous formamide formation?

Kind of a follow-up to this earlier question: How could formamide lakes form on an exoplanet? Suppose the problem of how to get an initial quantity of formamide is solved, and microbial life has ...
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2answers
71 views

What would be the most realistic approach for a Seismic Radar in a Land-ship?

Context: For several reasons regarding the planet, such as its atmosphere density, landscape and its interference on electronic equipment, in this specific planet, people preferred to use land-ships ...
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Help with my ocean currents

First off, I'm really not good with designing ocean currents (I find the topic confusing and hard). But for my world which is basically just earth over 100 million years in the future, I need to ...
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0answers
93 views

Alpha Centauri/Binary Star Planet Orbits

One of the physical constraints to planetary systems around Alpha Centauri A and B that many papers have pointed out is that the planets would need to orbit in the plane of the A-B Orbit, not the ...
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2answers
118 views

Days with a torus shaped Sun

What would day and night look like on Earth (or any habitable planet), if the sun was torus shaped, with the same circumference? And moreover, how much the Earth will be affected, if the sun was ...
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2answers
153 views

How would Superspeed be Explained?

In the comics, superspeed,- being the ability to move (in particular, run) at speeds typically at least as fast as something like a racecar), whenever it is shown, seems to tend to have the ...
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0answers
125 views

Weather for a dense-atmosphere water world

In this answer, I describe a low-density water world with a surface gravity of 1g and a surface atmospheric pressure of 20 ATM. The air temperature at the 1 ATM altitude (naively, assuming a ...
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0answers
89 views

How a creature with "bio-radiocomunication" would work?

Animals exist that use bioelectrogenesis allowing for electrolocation. Is this so different from "bio-radiocomunication" that it would disallow animals to develop this ability? An animal ...
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1answer
79 views

How hot would daily highs get if it were always the summer solstice in the Northern Hemisphere?

Imagine the Earth's axis of rotation were to precess in synch with the orbit of earth around the sun so the north pole always pointed towards the sun (same current axial tilt of about 23 degrees). ...
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1answer
161 views

How to Turn Protoceratops Into a Real-Live Griffin

It was believed that the discovery of a small, herbivorous dinosaur named Protoceratops was the inspiration for the creation of the iconic griffin, a belief challenged in 2016 by paleontologist Mark ...
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1answer
133 views

Fusion Orion Drive

Orion drives are awesome. Nobody can deny that. They are however a little outdated and still use pure fission pulse units. Obviously they are in need of an upgrade! A good place to start would be ...
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89 views

Wind strength in a massive planet

I'm working on this planet that has 1.5x earth's mass, so the gravity is a little stronger, given that the density it's the same. The gravity is 1.15x earth's. As i don't know how to calculate the ...
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1answer
68 views

What would the equator be like if Modern-Day Earth were as hot as the Cambrian?

This is a map of Earth's climate today: This is how the Koppen classification colors the particular climates, so I don't know why the lower latitudes were dominated by several shades of the color ...
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43 views

What would the climate of a Pangaea-Ultima-inspired world be like?

In a sci-fi scenario, human explorers have discovered a binary of G0 stars, each one 105% as wide, 110% as massive and 126% as bright as our sun. Orbiting this binary within its habitable zone is an ...
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71 views

What is the Roche Limit of a White Dwarf Compact Star?

Far, far away in the universe (specifically, 542 million kiloparsecs from here), a galaxy stands as an enduring legacy of a long-extinct hyperadvanced alien civilization, high among the Kardashev ...
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1answer
77 views

How much electricity a cloud can generate?

Introduction If lightning in the storm clouds is generated by the friction of ice crystals and water droplets, it would make sense that any type of cloud can generate static electricity, albeint in ...
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0answers
67 views

In regards to mass and luminosity, what are those mystery stars?

Long ago (4.6 billion years, to be exact), a hyper-advanced alien civilization had created a solar system from scratch. Somehow, they had artificially prolonged the center of the solar system--a ...
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62 views

Biosolvents for Life

What biosolvents could, in theory, permit the emergence of life on other worlds? I have been recently looking through possible biosolvents and I have found a good number, but I am specifically looking ...
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68 views

Does twice the planet radius mean two bands of desert per hemisphere?

Earth has three convection cells per hemisphere, resulting in each hemisphere having a band of desert at the end of the Hadley cells. Given a planet with the following characteristics: Twice the ...
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73 views

How do storms scale with planet radius?

I'm trying to figure out how weather scales with planet size, keeping other factors constant. For a specific example, say a planet with the following characteristics: Twice the radius of Earth. ...
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72 views

Will the Anatomical Differences in These Humanoids Affect Baby Development?

Okay, here are two hypothetical species of the genus Homo. One averages 67 to 84 inches (170-213 cm) in height and 99 to 110 pounds (45-50 kg) in weight and gives birth to twins. The other averages ...
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42 views

In this infant (<500 million years) solar system, how far would each orbit be to be stable?

Here's the story: There is a solar system that is still a baby, less than 500 million years old. There are a total of eight stars clumped into four binaries, each one with its own habitable zone. ...
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64 views

Effects on World Climate without (Most of) northwest and central Europe

So I'm considering creating a fantasy setting heavily modelled on Earth with the exception that most of what we consider Northwest and Central Europe is replaced by sea. I decided to as a reference ...
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103 views

How Bright Would the Sky on This Alternate Earth Be? The Sequel to "The 372-Day Calendar"

Long ago, I asked how far Earth would orbit the sun if one year lasts 372 days instead of 365 and how much it'd affect the overall brightness. What I got was that Earth with a 372-day calendar would ...
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55 views

Would a longer PETM make Earth hotter than it was?

Sometime between the Paleocene and Eocene epochs, there was a mysterious, sudden, dramatic rise in global temperature. This moment in time was known as the "Paleocene-Eocene Thermal Maximum",...
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1answer
79 views

What exactly are the requirements for the formation of a rainforest?

I am wondering exactly what features and properties are required for an area for a rainforest to be able to believably develop. So can people here please inform me of the known requirements, with ...
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45 views

Life in the Temperate Zone of an Alternate Earth with an Axial Tilt of 42 Degrees--What Would the Seasons Be?

Suppose that in an alternate universe, Earth has an axial tilt not of 23.5 degrees, but 42. This means that from the equator, tropical climates with binary seasons (wet and dry) would persist from as ...
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50 views

In a world like current Earth but where most forests have been cut down, what would be the impact on the world's Atmosphere?

In a world like current Earth but where most of the trees and forests have been cut down, what would be the impact on the world's Atmosphere, in short and long term? Would that make the world hotter? ...
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1answer
215 views

The Serina Series: Episode III: Pterosaurs

Let's take a different route and not take the Serina route using a modern species. Today, we're looking at pterosaurs. But considering that pterosaurs had ruled the skies from the Late Triassic to ...