Quantum tunneling is a fundamental principle of quantum mechanics where a subatomic particle can miraculously pass right through a solid barrier that it theoretically does not…

A closer look

Quantum tunneling is a fundamental principle of quantum mechanics where a subatomic particle can miraculously pass right through a solid barrier that it theoretically does not have the energy to cross, because particles exist in a state of probability where there is always a tiny, non-zero chance that an electron can simply teleport to the other side of an impenetrable wall; this mind-bending phenomenon is what allows the sun to undergo nuclear fusion and shine, essentially meaning that the laws of physics treat solid matter like a mere suggestion rather than a rigid rule, which is deeply frustrating when you consider that a subatomic particle can phase through walls effortlessly while you still somehow manage to walk into the same glass door twice