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Since having (eg.) two arms is a result of evolution, how can we, considering modern technology, force embryos to grow another limb? Polymelia is known to me, but it is considered a birth defect. I...
Many of you may have heard that supercritical CO2 (as in at just the right temperature and pressure to be in between gas and liquid) is a possible alternative solvent for life, like water is for us...
So, in my world, a scientist (tries to) invents a machine that will recode your cells in a very particular way, making you immortal. He tests it out on a 13 year old male. It goes....extremely wron...
In the Command & Conquer series of games, there is a mythical 'plant' life called Tiberium. It ends up being of alien origin through the course of the games, but its role in the game is as a ha...
In my world, which has an Earth-like gravity and environment, an adult, fit humanoid male is 3 inches tall. When I do a simple ratio calculation, I come up with him weighing 7.9 pounds. Basically, ...
Earthquakes release a lot of energy, and some places on Earth have quakes happening very often. I have seen sources quoting the Earth having quakes from 20 to 1,400 times a day, depending on the Ri...
I am pondering a world, where life very early on took a slightly different turn. First some background sketch, to explain what I mean: Current theories state that life first evolved as protocells:...
What are the cost and restrictions or benefits of a creature being able to slowly morph from an animal to another while retaining memories? The creature morphs to giant eagle then morphs into fis...
In my alternate reality, Earth is not a planet. It is a moon and orbits a gas giant (however it has all of Earth's characteristics, it is also full of humans and life as we know it). This is the on...
Raining animals is a rare meteorological phenomenon in which flightless animals fall from the sky. Such occurrences have been reported in many countries throughout history. One hypothesis is tha...
In the world of this question, ants and especially termites are the dominant herbivores by mass. There are no large grazing mammals competing with the bugs for the siliceous grasses and thorny tree...
I'm aware this question has been been answered in some detail and form, but I'd like to know this. How spectacular would a nebula look like from the surface of, let's say, a Super-earth like plane...
I'm trying to auto-generate random solar systems, and I'm basically just allocating 2% of the total system mass to planets (and moons). It provides interesting results, I always have a few gas gian...
In my world, 3-inch humans live on an Earth-like planet. My question, provided by a comment on a previous question, is: What would an anatomically correct 3-inch human look like? How strong would ...
So once again the world is in the Pangaea formation and the plates are moving on the same trajectory to form the continents that the world is in today (I'll refer to it as Modern). Instead of movin...
My question is pretty simple, if the steam locomotive were invented during the middle to late medieval period, what would it look like? We are just going to ignore how it was invented. My guess i...
Premise I recently recalled when the Chelyabinsk meteor crashed overhead in 2013. The pressure wave was immense. The infrasounds, as recorded by nuclear missile detectors, appeared to traverse the...
Imagine a small primitive humanoid civilization that developed independently in caves under the surface of Ganymede. We can assume there's enough light that filters through the crystalline surface ...
I've got a subspecies of human, Homo Volantes, that has been designed to live both in zero-G and in surface gravity. Several adaptations have been made, one of them including the replacement of fra...
Question How can Zircon be used to record data for generations of life forms? Requirements Must be able to store the data with little to no loss of it, for a least 541 million years The data in...
So I have an alien biosphere in which trisexual reproduction predominates. As far as we can tell, trisexual reproduction does not offer an advantage when it comes to shuffling genes. The biological...
Inhabitants of another planet (their biology is yet undefined, and if helpful to solving the problem, suggestions can be included in the answer), have a spaceship in which they plan to accelerate t...
So, in this alternate Europe, there are some obvious differences. First off, the Baltic Sea is no longer a sea, but now the Baltic Plain. Also, the Low Countries are absent entirely. There are...
A planet is in the brink of destruction with constant wars and chaos. To somehow save their world a group of scientists launched a nuclear warhead all over their planet to release a gas that would...
First question so go easy! I've been looking around for the carrying capacity of Elephants, hoping to extrapolate that to a Woolly or Columbian Mammoth. I know logging Indian elephants can lift hal...
