From StarTalk.

In this conversation, Neil deGrasse Tyson and Chuck Nice respond to a listener’s question about what a vacuum truly is — exploring why fans can’t work in space, how scientists create near-perfect vacuums on Earth, and what “nothing” really means in physics. Tyson expands the concept into deep philosophical territory, discussing virtual particles, quantum fluctuations, and how even “empty” space is filled with energy and the fabric of spacetime itself.

From ‘Answering Questions About How Black Holes Die, Entropy, & Vacuums’: https://youtu.be/qmX_DO26i94?si=o5_Hm7zkmAKQtWxe

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