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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.

1 vote

Would a society which possesses knowledge of all aspects of science from the time of early c...

Since this is a worldbuilding question, it's pretty appropriate that it depends on your world. Science is exploration. It is observation and extrapolation. It is the process of inquiring and learning …
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0 votes

What kind of senses could exist?

Like others have pointed out, humans have more than five senses. But this knowledge isn't really useful for making an alien species with new senses. Instead, take a look at some other animals. Some an …
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5 votes

Can singularity be achieved in a PC without any external information?

In reality, a computer has extremely large amounts of information but no knowledge. Imagine you have a large number (very large number) of sheets of paper, all filled with text. But, they're all writ …
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20 votes

What could be the cause of a disease that makes someone or something fall towards the sky?

With sufficient worldbuilding, your creatures could be affected by Electric Imbalance Syndrome (EIS) Similar to amflare's answer, but differing in that Electric Imbalance Syndrome is biological in n …
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0 votes

Do we actually have the technology for a permanent Moon outpost?

One matter of particular importance is the amount of fuel you would need to launch that sort of stuff to the moon. According to this, about 90% of a rocket's mass is fuel, which is an ironic issue, as …
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3 votes

Why would vampires be incapable of entering a non-vampire human’s house uninvited?

I like the psychology angle. Consider that perhaps they can, but they just don't. Vampires are traditionally vile creatures, and there's a certain poetry to the limitation. It mirrors a condition in t …
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12 votes

How to effectively slow down a ship about to shoot through the Solar System at 0.6c?

A few options, courtesy of Isaac Newton and his third law of motion: Jettison the propulsion system in the direction of travel with really high speed (how high depends on the relative masses of the …
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4 votes

How could we time travel backwards without killing everyone with germs from the future?

The Novikov self-consistency principle states that any time travel is mathematically required to be self-consistent. That is to say, the traditional time paradox isn't possible. Consider drawing your …
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1 vote

How does a self-cleaning kitchen put away the dishes?

Seems to me we need to rethink the kitchen entirely. Where do dishes go when they are put "away?" We have cabinets and cupboards that we keep dishes in, so we always know where to find them. But who …
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2 votes

How can an unimaginably huge life form reliably communicate with mortals?

One significant problem is that with a lifeform that is so dagblasted slow, there's a limit on how much information they can transmit before we can't understand it anymore. Suppose they succeed in ge …
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3 votes

Reasons for my dark ages world to have no horses at all

This might be more of a writing answer than a worldbuilding one, but hopefully it'll help. The two aren't necessarily exclusive. You can have a world where "nobody has ever heard of a horse" but stil …
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