Is there a physical limit to how small the universe can get?

Space · Published 31 October 2026 Swipe more like this →

In short: Many scientists argue that the Planck length represents the absolute floor of reality. In this episode, Fermilab's Dr. Don Lincoln explores whether these constants are truly fundamental limits or if our current understanding of physics is missing a piece of the puzzle.

The video examines the debate surrounding the Planck length and Planck time as the smallest possible dimensions of size and duration. While often cited as the ultimate physical boundaries, Dr. Don Lincoln clarifies that the reality behind these constants is more complex than common perception suggests.

The discussion touches on foundational physics concepts, including energy conservation in general relativity and historical papers by Alden Mead and Frank Wilczek regarding absolute units and gravitational connections to fundamental lengths.

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