And the article clearly states that it because of quantum mechanics that this happens. However, QM only operates at these small scales. It does not work on the scale of our everyday lives.
Let me try explaining it another way. Newton came up with his ideas about how the world worked, and people developed on them. These laws described things like how objects move when you throw them, how much force water applies when it flows, all that sort of thing. It dealt with the stuff that people experienced in their everyday lives.
These laws were very accurate, but not precisely so. There were some errors that people couldn't account for, such as planets not being in quite the position that was predicted. It wasn't until Einstein developed relativity and understood that the errors had occurred because they had treated gravity as acting instantaneously, and gravitational effects moved at the speed of light instead. Einstein's new equations were extremely accurate and gave the correct predictions, but they were also very complicated to figure out. Since the old equations were much easier and gave results that were accurate enough for most purposes, we held on to them, even though we know about the errors.
But still, Relativity and Newtonian laws only apply to the everyday world. When it comes to other things, the very small like subatomic scales, or the very massive, like singularities, Relativity breaks down and gives nonsensical answers, like saying something has infinite speed, or an infinite amount of gravity. It is at this point we need to turn to quantum mechanics. But QM has not replaced relativity. They are two different things, each explaining a different aspect of the world.
