So, where scientifically could it happen? I can think of two scenarios......
First, a Land of the Giants world. Since molecules cannot be enlarged or reduced, why couldn't there be a world where humanlike organisms grew to giant size? Not bigger molecules or cells, but more of them. Look at the T-Rex from our planet's history. It was a thousand times larger than a human being, thus having a thousand times more cells. (The same would apply to Earthlings on a planet of tiny people) If this was not the case, the tiny Earthlings couldn't breathe the air, drink the water or eat the food on that planet if the molecules were larger than on Earth. Gravity would be an interesting concept too. If the gravity of the giant's world was comparatively similar to our gravity's effect on us, the tiny Earthlings would be super agile, able to jump much, much higher and survive a fall from a much higher height than we can on Earth. Super strength, probably not. I don't think that would change.
Second, could a Borrower exist? Well, look at a mouse. Anatomically, other than size, they are not that much different than larger animals or even humans. They can breathe the air, drink the water and eat the food available on our planet. They are obviously not as intelligent as us, but scientists say we only use a small portion of our brain's potential, so what if a tiny race of hominids evolved into humans of a tiny size but with the ability to use much more or even their entire brain? Even in a mouse sized brain, they just might reach the same cognitive cerebral functional levels as us.
Thoughts?
