I have read about Planck length on wikipedia.
In some forms of quantum gravity, the Planck length is the length scale at which the structure of spacetime becomes dominated by quantum effects, and it is impossible to determine the difference between two locations less than one Planck length apart.
Can someone elaborate? Or point me where can I read more on the subject?
Do I understand it correctly that it actually says that each new time slice of the universe is created by discrete step of Planck length? As mentioned in this article.