Is Extraterrestrial Life Hiding On Earth?

Introduction

There's something strange about our world that we might not even know about; extraterrestrial life could be hiding here on Earth. Sure, there might be a theory that extraterrestrial life is in another dimension. Sure, microscopes let us see microscopic life, yet if the life is also too fast, then we might not know that it exists. Maybe that life, which might require a slow motion electron microscope, also doesn't interact with visible light. The idea is that, we can't use equipment to observe reality much, if the technology is too advanced. The idea here is that we live in a world where we think we can detect everything that exists. Reality essentially tries to escape us; we discover reality's secrets at the microscopic level; then reality still has an advantage over us, because although we might have an electron microscope, if reality happens too quickly, then the microscope might be too slow to register phenomena that happens to be moving too quickly. And reality still has an advantage over us; if we try to record through a microscope using a slow motion camera, that camera will not record the entire electromagnetic spectrum, and the extremely fast, microscopic phenomena, might not even interact with light which we can see. Then again, reality still has an advantage over us, because that extremely microscopic briefly occurring phenomena, which maybe doesn't even interact with light, could be in another dimension. ~
Out in space, there might be an exotic form of gas which might not be native to Earth, yet it might be found in the atmosphere because it has wandered in from space. That gas would most likely be extremely diluted, or sparse.

Abstract Summary

Consider the fact that this gas could theoretically condense and form a barrier inside of which would essentially be a miniature world, which could exist sporadically on Earth, and extraterrestrial life could exist inside of the enclosed environment, isolated against our hostile environment, for a very small amount of time.
It might be that if enough of the gas condenses at the ground, it might form a micro climate. The gas could be repellent to the normal environment, such as the inside of the gas could be a warm environment while the outside environment is cold and inside of the gas, there could be extraterrestrial bacteria. The gas would dissipate very quickly, so the extraterrestrial bacteria would be gone quickly. The gas could be extremely rare, so we don't even know that it exists in the atmosphere. The mist is extremely resistant to the outside environment and doesn't let in water. For example, mist could divert water around itself, such as the mist would be a barrier through which water could not go through. There could be a stream of mist flowing through a river, and the water would need to weave around the mist. We don't know about the existence of extraterrestrial life on Earth, because of the fact that the conditions that need to combine for the mist to form are sporadic and to actually notice the extraterrestrial life while it is still alive, is unlikely. And the bacteria need to float down to Earth, where there is an extremely small chance that the bacteria will float down into a puddle of this rare gas, and into a micro climate, which dissipates quickly.