Have you heard about the pangea theory, that claims the earth is expanding? What are some observations to back up such theory?
The Pangea theory you're referring to is likely the theory of plate tectonics, which states that the Earth's continents were once joined together in a single landmass called Pangea and have since moved apart due to the movement of tectonic plates. This theory is supported by a variety of observations, including the matching of coastlines between continents, the distribution of fossil species, and the presence of similar rock formations on different continents. Additionally, the study of earthquakes and volcanic activity has provided further evidence for plate tectonics.