v can feel d matter wich v see with our eyes (ATLEAST SOLID n LIQUID) but ppl say day dere too exits dark matter wich lies beyond our visible range, y cant v feel dem PHYSICALLY atleast if dis was TRUE !
138600
When astronomers measure the orbits of stars in galaxies, they are found to be orbiting at a speed that requires more gravity than can be accounted for by all the visible stars and interstellar gas and dust in the galaxy. The assumption is that there is more matter that we can't see with any telescope that is causing the extra gravity. They call it dark matter for lack of a better name.
156670
I doubt it.  Even with the vast size of the universe if such a thing could occur it might be very small.  Consider this.  If you can see things in outer space then photons have to be present; even in shadow.  They bounce off of objects and register on your retina.  It has been proven that photons do have mass and are matter.  Also neutrinos are all over the universe and can pass through all matter.
557573
I believe in ghosts, but have never seen one. I think I have felt one, however - I think it was my grandma's ghost and she placed her hand on my shoulder but I looked at it and there was nothing I can see. Then, she must have left her hand because I felt something going off my shoulder.
592824
Thank you! Very informative (and correct) information!\nWell, according to Physics, the same vast quantities, dimensions etc., we have to the large scale, we also have to the small scale, going from our size into smaller (cells, moles, atoms, electrons, nuclei, ....)\nFurther, according to my theory, the Universe we described above is the connection between other universes! As a matter of fact, each one of us is a Universe greater that the one we usually talk about! After all, people discover the dimensions, Greeks named 4 of them and we, somehow think we understand them! People understand only what has been named! That is why we can not comprehend the other dimensions, since we have not discover how the Greeks named them!
347499
All it means is that we don't know everything. We've learned quite a bit in the short time since we developed written language and the scientific method, and the rate of learning is accelerating. We'll learn more in the next 10 years than we've learned in the last 100. We'll probably understand the nature of dark matter in the next 10-20 years, and I would bet long odds that it won't require any supernatural explanation.
7510
Well, its pretty much as crimsonmoonvc said.\n\nUnlike the spatial dimensions of perception, time is not directly accessable by any sensory organ. We precieve time by the unfolding of the events around us.
112252
yeah, you get a bit off on a deep tangent towards the end there... but I don't think Einstein asserted anything more than the idea that time, space, and matter are related and not independant.  two systems of matter travelling in wildly different velocities relative to one another also have different processions of time and different masses, from the perspective of the other.  It only applies to things moving close to the speed of light- I think it's the Schroedinger Equation that covers the inter-relation.  But there's no real analogy to it in the observable world, unless you work at a particle accelerator, so I leave it to the doctorates of physics to debate.
424063
Your absolutely correct. We receive both light and sound wave energy when we see or hear anything.\nI don't believe that's what gives us that strained feeling if we watch TV for extended periods - I believe that is just our body's way of telling us that it's time to rest a bit and give the ol' eyes a little time to recuperate. \nThat's because our bodies use more energy to process these signals than the signals provide.
587514
We observe four dimensions everyday, three spatial and time.\nTime is called a dimension because it makes mathematical sense to do so. \nBut...theories such as string theory predict that the space we live in has in fact many more dimensions (frequently 10, 11 or 26), but that the universe measured along these additional dimensions is subatomic in size. As a result, we perceive only the three spatial dimensions that have macroscopic size.\n\nThis is not so strange as it sounds, which I'll show with an example. Imagine you are in an airplane, flying over sea. Seen from a height, the sea looks flat, two-dimensional. But when the plane looses height we start to perceive the waves, that move in a third direction we could see before.\n\nThe universe could be the same. Four macroscopic dimensions and a few more, hidden ones. We can only perceive them for instance, by the small effects their existence might have on subatomic particles.
530356
people call "dark" what they cannot "see"".To "see" means to detect by means of their eyes that part of electromagnetic waves which we call "visible light".But there is much more "energy" than that.
570735
Personally I think the reason that there is less antimatter than matter has something to do with the arrow of time.  The last time I checked there was still not a very good explaination of why there is more matter than antimatter.  Its still an outstanding problem in physics.  Its a subject that, as a physicist, I'm very interested in.  Who knows, maybe you'll come up with an explaination.
52402
We know that's true, mathematically.  Check into the newest physics research.  Amazing stuff, really, but be careful of some of the new age nonsense about science (not a comment on new age, more about attempts to use half-understood science to back up there own ideas, which is foolish for anyone).  I've experienced that for a fact, though this isn't proof of anything to you, nor do I expect it to be.  Remember, we aren't that far from infants, to whom everything is a dim reflection of reality, and slowly learn to distinguish differences between one thing and another.\nExperiments with kittens show that when raised in boxes with only horizontal lines, let out when older, they cannot see table and chair legs and run into them repeatedly. When raised in boxes with only vertical lines, they cannot or will not jump onto chair seats or tables.  Neither group outgrows it if kept in the box for too much of their childhood.\n\nWhat have we missed?  What stimuli have we denied to ourselves and our children such that as adults, even if it is right in front of us, we cannot see it?  I live everyday seeing the world differently because of my experiences as a child and it gives me such an advantage dealing with people.  I'm not "better", just aware of things most people don't yet notice.  And trying to tell them only makes them look at me funny, so I simply use the knowledge, and everyone benefits without understanding why.\n\nI wish I could just show you.  Until then, I'm raising my daughter to see things clearly, to understand herself and seek the truth above all things, to love unconditionally and to choose happiness rather than search for it.\n\nThen again, maybe half of it is regaining your innocence... .  Maybe I'll see you one day.  I'll miss you until then.
119612
The safest way without drugs is an isolation chamber. Floating in complete darkness, in a liquid with the same temperature and specific gravity as the body for an extended period can often induce an out of body experience, along with auditory and visual hallucinations. It may feel like you're leaving your body, but the fact is it's simply an illusion caused by not enough bio-feedback stimulating the part of your brain responsible for situating your body in space. There have been numerous University studies that have used isolation chambers, in part seeking a rational explanation for near-death and out of body experiences. Interesting stuff.
252879
Antimatter is as real as matter itself, just ask particle physicists\n\nThe reason we do not have much of it around us is that it annihilates with matter, so our world now is matter dominant.
588262
WIMPS are "Weakly Interacting Massive Particles", which are hypothetical particles that have been invoked to solve the "dark matter" problem.  (Astronomical observations of things like the rotational speed of galaxies, and the interactions of galaxies in clusters can be explained if there is some form of matter, called "dark matter", that does not absorb or emit electromagnetic radiation, and thus cannot be detected by normal astronomical observations).\n\nWIMPS would only interact with other particles (and each other) via the weak and gravitational forces.  They would therefore be very hard to detect.  Because no one has yet detected them, and there are are not predicted by the "standard model" of particle physics, they remain simply an interesting conjecture.\n\nWIMPS are supposed to have large masses, and clumps of them could act as "gravitational nuclei" for the formation of galaxies in the early universe.  I do not know of any other connection between WIMPS and the inflationary scenario for the early universe.\n\nThe bubble theory of the universe is a variant on the currently favored inflationary theory for the early universe.  In this theory, instead of a single point expanding at a single time to form a single universe (ours) that constitutes all of physical reality, different portions of physical reality "decay" to form independent universes at differing times.  Physical reality would therefore correspond to a "foam" of independent universes, each of which is completely isolated from one another.\n\nI've never heard of the "hyperdimensional theory of the universe".
309682
excellet question. This got much deeper meaning then most people understand.\n\nIts energy, you see photons.  You touch and feel photon/photon exchanges.\n\nSince E=MCC, All matter are energy also, Photons.\n\nPhotons are travel at excatly the speed of light, and that makes them see the universe as a zero volume dot.\nIt takes no time at all to a photon to go from one end to the other end of the universe.\n\nThe next great question will be, where did all this energy came from.
88430
All I can say is that I have had the same experience throughout my life.  After reading and going to seminars and asking around, I still don't have any concrete answer.  It seems to be that some people are more in tune with the fact that space/time do not occur linearly.  Maybe we see things futuristically because we bump into a piece of space/time that isn't next in line as far as the timeline goes.  I can't explain it much more than that, as a scientist I am not.  I also can't explain why this seems to happen while we're sleeping.  But I'm feelin' ya bro.