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Let's think about why a supernova happens in a massive star. You probably know that after a star develops an iron core, further nuclear fusion is not possible on a large scale. Yes, you can produce...
Direct gravitation energy is a lost cause in freefall. If you're close enough to get gravity, then you're no longer in orbit and will die soon. There is a work around though, which does use gravit...
Maybe it doesn't actually have much to do with light as it does with nutrients. Say the mushrooms are parasitic on other plants and aggressively predatory. Their spores invade a forest, latch onto ...
To properly determine the orbital path of the asteroid, you'd need to do a numerical simulation (the three-body problem here likely not having an analytical solution). There are certainly $n$-body ...
Convert mass density to energy density, to get $9 \times 10^{-11}\,\mathrm{J/m^3}$ which isn't very much. After all, an adult human is on order of one eighth to one quarter of a cubic meter. So, a...
I like Sepratrixes answer as it interprets the old style question framework by OP. As a start the first thing would have been to research what the Mars colonist teams have planned and then make al...
We can use something called Kleiber's law (which I originally found here). It states that a power law describes the relationship between metabolic rate $q$ and mass of an animal $M$ (in kilograms):...
As Gary Walker said, there are not that many places that have land on a straight line tunnel that goes straight through the core. The good news is that you could go around the core by taking a hy...
How would the civilization discover electricity? That one is easy: There are animals in the sea that use electricity, like the electric eel. The underwater civilization would certainly be curious ...
How could a creature explode itself? Use Hexamethylene triperoxide diamine (or another organic peroxide)! Hexamethylene triperoxide diamine is an organic peroxide, which can be formed w...
In our universe, electric and gravitational force decrease with $r^{-2}$ because of the inverse-square law. Imagine a spherical shell around some point source. The area of a shell at some radius $...
(Ab)Use Religion to control the people A properly maintained religion can get people to do almost everything, and can guide their behaviour. People have killed others in the name of their religion...
You have to deal with the 3 body problem, specifically the small moon being pulled toward the much larger moon, and then moving away, and how this would destabilize the small moons orbit. The dista...
I think the two easiest ways for plants to communicate would be thus: Root System: Like in the movie Avatar, all of the roots connect somehow through the ground. This would also mean that certain...
The prime spot would be between the wings with the legs draped over and in front of the wings, straddling the neck. By sitting between the wings, the rider is at the center of propulsion, which ...
Radiator Fins Blood, lymph, or some other liquid is pumped around the ocular lasing organs to absorb waste heat and then through a radiator fin, where the heat is radiated off through the high sur...
For anyone who wants to see a cool simulation of a galaxy, merger, I can recommend a neat little applet): Galaxy Crash JavaLab.1 Two more good sites with a bunch of different simulations are the GA...
Rayleigh scattering is the primary reason that the sky is blue. Particles in the atmosphere "scatter" light in random directions. Blue light (along with violet light) has a shorter wavelength, and ...
Our universe is large enough that lots of weird things can happen. Believe it or not, we've found quite a few of them on exoplanets. This article about a paper on lightning on exoplanets (Bailey et...
This is perhaps not exactly the answer you are looking for, but I would suggest you consider the possibility of having the satyrs coevolve with your homids, but start from some other species. Human...
The biggest thing would be the storms caused by extreme low pressures. First off, because of the depressurization the temperature is going to drop way down. This would be cold even for Antarctic...
Since all the tech (including the airship engines I assume) runs on mana, then in addition to bowlturners ideas, you could limit speed by the need to "refuel". I'll have to make a few assumptions ...
Give them legs. They could be separate from birth and just covered with a swimsuit. Or they could be joined at birth and separate during puberty. These follow somewhat from some... Real life preced...
Both time dilation and length contraction depend on something called the Lorentz factor, commonly denoted by $\gamma$. It is defined in terms of the velocity, $v$, and speed of light, $c$, as $$\ga...
Couple thoughts on this... Angels aren't bred. Meaning, they don't have to mate, have baby angels, evolve, etc. Instead angels are designed and created, like robots, genetically engineered clon...
