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8 votes
4 answers
2k views

How to recreate a "land" harp that can work in the deep sea?

Once again, I am asking questions based on my as of yet defined highly-evolved, human-derived "merfolk". But this time, I'm going towards deeper waters-- let's say about 5000 meters below ...
Thunderhammer's user avatar
1 vote
0 answers
224 views

Non absurd way to lay a cable over light years of distance [closed]

This isn't entirely hard science but bear with me. (Prologue) In the near future, a series of increasing heavy elements are synthesized building on the theory of islands of stability, incredibly ...
MegatheriumMegafauna's user avatar
26 votes
13 answers
8k views

How difficult would it be to reverse engineer a device whose function is based on unknown physics?

Premise - A technological device of unknown origin is found by modern day humans. by messing with its controls, it's discovered that its function appears to create some kind of anomaly such as a ...
TehKaoZ's user avatar
  • 617
7 votes
6 answers
499 views

My Tripod Machines Have Flexible Legs like a Squid - - How do They Work?

In my world, a race of intelligent cephalopods have created mecha similar to the Fighting Machines from War of the Worlds (long story short; it makes sense for then as they evolved and continue to ...
Seraphim's user avatar
  • 5,053
7 votes
4 answers
658 views

Glowing Eye Lenses: Why are the Mooks parading their location?

In many a sci-fi, the villains (and sometimes the good guys) have glowing lenses attached to their gas masks to help both identify them and provide a useful target for the protagonists. The obvious ...
Seraphim's user avatar
  • 5,053
2 votes
2 answers
394 views

Would a gun that shoots subsonic depleted uranium/tungsten bullets require a muzzle booster for cycling reliability?

In the near-future story i'm developing the main character resorts to every trick in the book to improve the performance of her guns, including using subsonic cartridges for the sake of quietness, but ...
Paulo Raposo's user avatar
  • 1,319
7 votes
3 answers
2k views

Are Mass Effect "style" guns possible?

In Sci Fi, the majority of weapons come in the form of either some kind of energy beam/bolt, or as testosterone-dripping slug-throwers. In Mass Effect and the Aldreaverse utilize weapons that fire ...
Seraphim's user avatar
  • 5,053
4 votes
2 answers
190 views

Is a universal land and launch spacecraft theoretically possible?

Nearly every science fiction story features a craft which lands on a planet, allows egress to the surface, and then leaves the planet. Logistics is almost never a part of the story. In considering ...
Vogon Poet's user avatar
  • 8,209
3 votes
3 answers
322 views

Replacing heavy cranes with airships for alien city building? Pros/cons?

We are doing construction on an alien world with unbreathable air This creates a very big problem for a growing city which needs to expand. Workers cannot go outside safely for long periods. Goal: ...
Vogon Poet's user avatar
  • 8,209
2 votes
2 answers
150 views

Method of expanding a city in toxic environment

A city on an alien desert needs to expand, here is the method I feel should be cost-effective and cheap. Use the image below for reference. A square area is mapped out and leveled off for the ...
Vogon Poet's user avatar
  • 8,209
7 votes
6 answers
706 views

If a time traveler from the near future went back in time to kill Hitler and failed, could the nazis reverse engineer modern tech with 1940's tech?

Suppose someone went back in time to kill Hitler and fails and some modern tech falls into nazi hands. What modern technology could they realistically reverse engineer with 1940's tech? I'm leaving ...
Adam Kabbeke's user avatar
  • 1,983
10 votes
10 answers
5k views

Could extremely tall towers be held up by balloons so that they don't collapse under their own weight?

"Tower" may be a misleading word choice for what I have in mind. My approach to building vertical structures is a bit different, more on that later. There are two main issues that plague ...
LiveInAmbeR's user avatar
  • 10.8k
7 votes
1 answer
630 views

Can a hydraulic system also serve as a battery?

Hydraulics commonly use mineral oil or water to provide the pressure needed for mechanical movement, which is good but the liquid just sorta sits there not doing anything else. So I though “why not ...
LiveInAmbeR's user avatar
  • 10.8k
2 votes
4 answers
294 views

Mechanical-electric firearm ignition

For some time I've been thinking upon the concept of a firearm that uses a mechanical system to generate an electrical current for use in a electrically ignited firearm without the hassle of batteries....
Seraphim's user avatar
  • 5,053
10 votes
7 answers
4k views

How efficient would pumping water uphill be using hydropower?

How efficient would hydropower be at pumping water upward? Waterwheels are the cornerstone of unmanned power and are basically gravity powered (solar too if you count the water cycle,) which is very ...
LiveInAmbeR's user avatar
  • 10.8k

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