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For questions that require plausible (better than suspension-of-disbelief) answers based on Real World science that are not necessarily constrained to the known limits of Real World science. Contrast with the hard-science, science-fiction and internal-consistency tags. This tag may not be used alone. This tag may not be used with the science-fiction, hard-science, or internal-consistency tags.

38 votes

A 40km diameter alien saucer is floating 2km above the ocean for a long time. What are the e...

Why is it that in questions like this about something blocking light, everyone seems to forget that the Earth rotates? To simplify the geometry, we'll use the following assumptions: the saucer has a f …
Keith Morrison's user avatar
37 votes
Accepted

How might my futuristic interstellar civilisation have missed a Dyson swarm on their doorstep?

Simplest explanation: until recently, humans simply didn't see the star directly as it was hidden behind a small, but thick star-forming nebula between it and Earth. (One doesn't really exist, but on …
Keith Morrison's user avatar
30 votes

What would make human males an inefficient option for spreading alien genes?

A human male produces millions of sperm a day, and can have hundreds or even thousands of children fairly quickly. Yeah, no. For several reasons, the main one among them being that the number of men …
Keith Morrison's user avatar
30 votes

Why wouldn't all wizards be buff?

Take a look at professional or Olympic-level athletes. All are extremely fit, but they display differing levels of muscularity and size depending on their disciplines, because different types of physi …
Keith Morrison's user avatar
22 votes

How can a valley surrounded by mountains be fertile and rainy?

I give you Kelowna, British Columbia, and the Okanagan Valley. Surrounded by mountains, it's a humid continental climate with no shortage of vegetation and is certainly no desert. For a larger exampl …
Keith Morrison's user avatar
19 votes

Language that cannot be divided into words?

A strange inherent structure for a well-developed language would be far more interesting, and open up narrative possibilities like a Universal Translator being unable to translate anything an a …
Keith Morrison's user avatar
16 votes

What is a reasonable timeframe to build a funeral pyre with a hundred corpses, with five apo...

Frame Challenge If the bodies have been inside for two weeks before being moved, they will not want to live in that building unless they're prepared to do extensive renovations. I have twice been invo …
Keith Morrison's user avatar
16 votes

Is my river map even remotely realistic?

You have some severe issues. At the points marked "1", you have rivers doing things they don't, namely different drainage systems combining and then separating. All the lakes marked "2" have no ou …
Keith Morrison's user avatar
15 votes

Why would vampires require human blood?

They're all junkies. They're not after the blood, they're after the endorphins in the blood. Their own system uses a slightly different class of hormone to fill the role endorphins do in ours, but the …
Keith Morrison's user avatar
14 votes

How to accurately detect children with super strength?

Tests that depend on surprise or reflex, not conscious action. Also of benefit is that kids tend to have poor decision making skills, which means it's easy to make them forget instructions to cheat. …
Keith Morrison's user avatar
12 votes

How long will it take to discover they live on a moon and not on a planet?

There's a factor you haven't considered: what size is the primary, and how far from the primary does pseudo-Earth orbit? For why this matters, consider a primary the size of Jupiter. Let's say pseudo …
Keith Morrison's user avatar
12 votes

How to allow a sentient cephalopod to live a long lifespan?

As you point out, the ability to have multiple breeding cycles did evolve in cephalopods, with the vampire squid being another example so there's no particular reason why that could have not evolved s …
Keith Morrison's user avatar
11 votes

Habitable zone around a Blue Supergiant

Note that the lifespan of the star is going to factor here. Rigel is estimated to be only about 10 million years old and will go kablooey in a supernova within the next few million years. That makes t …
Keith Morrison's user avatar
9 votes

Evidence of spacetime anomaly in local geology?

You, as the author, need to know three things before that question can be answered: What is the nature of the appearance; What type of ground is the manor on; and Where did the manor really come fro …
Keith Morrison's user avatar
8 votes

Can electronic warfare be used to bring space combat into visual range and protect fighters/...

The problem with trying to jam in space is that you are loudly announcing to everyone where you are, so all they have to do it turn down the gain on passive sensors and you've kindly given them your e …
Keith Morrison's user avatar

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