TED-Ed: What is the universe expanding into? - Sajan Saini

The video explores the expansion of the universe, starting with Hubble's observations of galaxies receding from Earth. It delves into cosmological models like the inflationary model and multiverse theories, suggesting our universe might be one of many. String theory and branes are discussed as potential explanations for the universe's structure. The video concludes with speculative models and the challenges of testing these theories, highlighting the need for future research.

What new insight or understanding did you gain from this video?