As a physicist specializing in quantum mechanics and cosmology, I can tell you that the concept of "nothing" is quite complex and nuanced. In classical physics, "nothing" might be thought of as a vacuum with no matter or energy. However, in quantum mechanics, even what we consider a vacuum is not truly empty. It's filled with quantum fluctuations and virtual particles that pop in and out of existence.

"Nothing" can also be philosophically considered. Philosophers might argue that true nothingness is a concept that is logically impossible to achieve because by the very act of defining or discussing it, we are giving it some form of existence.

In cosmology, when we talk about the origins of the universe, concepts like the Big Bang often lead to questions about what came before, and whether there was "nothing" before the universe began. These are still areas of active research and debate.

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In a previous video, we argued that typical notions of 'something' and 'nothing' don't really make sense according to modern physics. But many commenters objected to this idea, calling it a semantic game. Surely there must be such a thing as a true void: no matter, no energy, no distance... just pure nothingness.read more >>