Are there living creatures that move about the earth at speeds humans can not see, hear or otherwise perceive?

Answer 1

I think the question needs some qualification :-)

Cetainly single-cell organisms are not usually visible to the naked eye - but an amoeba can be seen to move under a microscope. In the same manner, a grape vine may appear stationary to our normal senses, but time-lapse photography shows tendrils reaching out to entwine with nearby plants. I suspect that there are very few of what could be termed living creatures that our human-manufactured instruments would fail to detect in one form or another.

Your question probably has real meaning to exobiologists or others attempting to come up with novel ways to detect the presence of life on other planets (or moons!).

Answer 2

There would be an upward limit on speed, since any such creature would have to travel through the air or water, the drag would eventually overcome any forward push, limiting the creatures speed to some "terminal velocity". If it were going fast enough, it would eventaully have to contend with the sound barrier (travelling through the trans-sonic region causes massive, fluctuating pressure waves that can rip apart poorly designed vehicles, or in this case, creatures) and with heat due to friction. Anything sturdy enough to go super-sonic would certainly have to be large enough to be noticed. Anything smaller couldn't concievably achieve those speeds.

Nothing, by the way, is too fast to -hear-. The sound waves always travel at the same speed, and even if its gone by the time they reach you, you will still hear it.

Answer 3

Plants bend and move toward the light at speeds far too slow for the human eye to perceive by itself.

Answer 4

No, there are not. Living organisms here on earth--regardless of the species, body size and their mode of locomotion--are incapable of reaching a speed too great for us to detect them with at least one of our natural senses. The larger the animal, the less likely that it could move at such a speed. The closet contender would have to be a very small, fast flying insect.

Answer 5

The only way it would be possible would be if it resided in higher dimensions that didn't intersect with our own or a parallel dimension, which would have the same effect. It couldn't intersect with our own as you would be able to percieve it with one of your senses.

For alternate dimensions a creature could walk right through you and you wouldn't know it. If it was in our dimension it would probably combust under friction before it got anywhere close to superliminal(faster than light) speeds.

Answer 6

You're talking about a creature that humans cannot detect? See every argument about the existance of a god.

Answer 7

Well, trees move too "slowly" for us to perceive their motion.

So they fit the category.

Answer 8

Sure. They're called bacteria. They're so small that a microscope is required to see them.

Answer 9

if humans can not perceive, then how can a human being know that there are such things ???

Answer 10

It's entirely possible; it is just one of many possibilities in a vast world of which we know so little.