Abstract:

We review the Standard Model of Cosmology and Gravity, that has been established through intense theoretical and observational investigation. Additionally, we provide the motivation of extending it in various ways. Then we present the new window that has opened in science, namely multi-messenger astronomy, in order to study the Universe and constrain theoretical models and scenarios. Finally, we summarize the famous tensions between various datasets and theoretical predictions, that could be a sign that we are approaching New Physics.