Description

In this article, astrophysicist Ethan Siegel delves into one of humanity's biggest questions: where did the Universe come from? Beginning with the Big Bang theory and its observational evidence, Siegel explains how scientists have refined their understanding of the early universe. The discovery of cosmic microwave background radiation, light elements' abundances, and galaxy distribution have provided strong support for the Big Bang model. However, puzzles remain unanswered, such as the horizon problem, flatness problem, and monopole problem. Introducing cosmic inflation as a potential solution, Siegel discusses its impact on our understanding of the Universe's early stages. Despite progress, questions about the ultimate origin of the Universe continue to challenge scientists.