No, I am not familiar with a theory that claims the Earth is expanding, called "Pangea theory". The most widely accepted scientific theory about the formation and evolution of the Earth is plate tectonics, which explains the movement of the Earth's continents over millions of years and does not involve the expansion of the Earth itself. This theory is supported by numerous geological, geophysical, and geochemical observations, such as the existence of mid-ocean ridges, the distribution of earthquakes and volcanoes, and the similarity of rock formations on either side of oceanic spreading centers.
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