Part 3/15:
Using their notes and references from academic papers, the host explains that plank length correlates with the idea that attempts to probe smaller scales would require infinite energy, ultimately collapsing into black holes, thus preventing any measurement below this threshold. This is supported by a discussion on the Heisenberg Uncertainty Principle and its generalized form, which introduces effects of gravity, leading to the conclusion that at the plank scale, space-time itself ceases to have classical meaning.