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Did you ever think about Gravity, what is it, why is it there, why it forces us to stay down on the earth. In other word did a question cross over to your mind, what the hell is Gravity?
Well, other forces are arbitrated by particles and Electromagnetism, for instance, the exchange of photons. According to the McNees all the other forces can be quantized or you can say they could be manifested as individual particles and have non-continuous value. But Gravity doesn’t work like that nor seems to be like that.
If we believe what most physical theories say then it should be carried by gravitation, a hypothetical mass less particle. But the problem is that it’s just for say but in reality nobody has found gravitons yet also it’s not for sure that any particle detector that could be built, could see them too, because if the gravitons is made a contact with matter, then it happen very, very seldom — so rarely that they’d be latent against the background noise and furthermore It’s not even sure that gravitons are mass less, but if it have a mass at all then it should so small- much smaller that can’t be seen, and if that’s not true then isn’t it should be seen by.
According to the String theory- Gravitons (along with the other particles) are closed loops of energy, but in the other hand mathematical work hasn’t submitted much insight so far.
Gravitons is become a subject which is physicists hasn’t been fully observed yet because gravity has denied all attempts that try to understand it in the way we observed and understand other forces like an exchange of particles. Some Physicists, Theodor Kaluza, and Oskar Klein say that gravity may be working as a particle in other dimensions beyond the three of space- length, width, and height. And maybe there is time duration when we are familiar with it,
But whatever the physicists say it’s sure that we still didn’t know enough about gravity.