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Results tagged with science-based
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user 98
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.
130
votes
20
answers
43k
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Could a planet made completely of water exist?
In the Star Trek: Voyager episode "Thirty Days", there was a planet made completely out of water, which is the inspiration for this question. However, that planet was held together by an artificial c …
- 589
17
votes
3
answers
1k
views
Sharks with frickin' lasers!
Yes, this is about Dr. Evil's dream: Sharks with frickin' lasers. Except that the lasers would not be artificially attached, but be part of the animal itself (bio-lasing instead of simply bioluminesce …
- 14.2k
19
votes
7
answers
20k
views
What would an ammonia-based world look like?
Apart from the obvious difference that liquid ammonia needs a much colder temperature than liquid water (but ammonia-based life forms wouldn't feel that as particularly cold), what would be the most o …
- 6,322
26
votes
4
answers
7k
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What minimal radius is needed for rotation to simulate gravitation without adverse effects o...
A quite common idea to provide "gravitation" in space stations is to make them rotate, so the centrifugal force gives an effective gravitation. A possible design is a ring-shaped space station.
Now o …
- 4,907
0
votes
What are the Limits of Laser Weapons in Space?
I think if you build the ship wall out of retroreflectors, with a layer of high melting point material below, then you've got the perfect defence against attack lasers. Any laser directed at your hull …
- 31.6k
15
votes
Accepted
How to let a Whale urh... fly?
Note that whales have no wings, so they cannot fly like a bird or a bat; they would have to fly like a balloon or Zeppelin. Basically, you need to get their density down to less than the density of ai …
- 31.6k
14
votes
6
answers
5k
views
Realistic spaceships: How to design a transport spaceship?
OK, here's the problem: I want to have a spaceship that is built for transporting large machines (in particular, heavy mining equipment). It does not and is not designed to leave space; transport down …
60
votes
Accepted
What would a planet spinning fast enough to allow geostationary orbit near the surface look ...
I'm taking "near ground" as meaning "the height over ground is negligible compared to the radius of the planet". That is, we can as good approximation we can assume that the radius of the geostationar …
CommunityBot
- 1
13
votes
6
answers
5k
views
Humans as pollinators
Plants can have very different pollinators: The wind, insects, and even birds. However, is there a conceivable scenario where a plant could naturally have evolved to depend on humans as pollinators, w …
CommunityBot
- 1
1
vote
Quantum Based AI getting around Isaac Asimov's "Three Laws of Robotics"
Quantum computers operate differently than classical computers, and most importantly, doing measurements in the middle of a quantum computation process will disturb the process, and possibly lead to u …
- 31.6k
7
votes
5
answers
376
views
Animals for weightlessness
OK, so humanity is going to space, and they are going to take farm animals into space, not only humans on earth value meat, but humans in space do, too. However, they don't want to waste precious reso …
- 5,372
4
votes
How does a species with three "sexes", where only two needed are at a time, determine the se...
Here's another option:
There are three genes: The X gene, the Y gene, and the Z gene. And there are three sex chromosomes: The XY chromosome, the XZ chromosome and the YZ chromosome. Each sex chromos …
- 31.6k
2
votes
Making a lethal, hard to cure virus?
A possible way to have the virus spread quickly yet be deadly is to have a double effect. Shortly after infection, it basically acts like the common cold. The common cold spreads quite effectively eve …
- 31.6k
0
votes
Why would War Of The Worlds happen?
Martians were divided into many fractions hostile to each other. The martian leaders were desperately trying to find a way to pacify Mars. Of course historically the best way to unite your own people …
- 31.6k
20
votes
Stopping time, by speeding it up inside a bubble
Well, let's see how such a field would work. The Hamiltonian equations are
$$\frac{\mathrm d x_k}{\mathrm d t} = \frac{\partial H}{\partial p_k}
\quad
\frac{\mathrm d p_k}{\mathrm d t} = -\frac{\parti …
- 31.6k