1. Mysteries of the Earth

The first episode shows how Albert Einstein revolutionized our understanding of the universe with his theory of relativity. It explains that he initially believed in a static universe and introduced the cosmological constant to support that idea. The story then follows how Edwin Hubble provided observational evidence that the universe is actually expanding. This discovery led to the birth of the Big Bang theory and the foundations of modern cosmology. Overall, the episode illustrates the shift from a fixed universe to one that is dynamic and constantly evolving.