The earth has expanded. It has about doubled its radius in the last 250 million years. It is now expanding about 1" in radius per year and that rate is increasing exponentially. Mass is being gained. Gravity 250 million years ago was about 50% of today’s. The continental landmasses fit back nicely together on a smaller sphere. There were no oceans between the continents. There were no oceans, only shallow seas that covered much of the land. (Marine fossils of that time have been found on the land; not in the oceans.) The atmospheric pressure was likely much greater (aka, Venus). Oxygen content was less. Mass was gained in the core and grew and expanded out the mantle and crust. New minerals were produced. Natural gas and liquid petroleum were produced. The developing atmosphere outgassed from the interior. The water was created and outgassed and oozed from the interior. Insects, plants and animals evolved robustly to fill the available niches. They grew to gigantic size as low gravity and atmosphere will allow. As mass was gained, gravity increased, the atmosphere changed and large living things went extinct and were replaced by continually adapting smaller living things. Major earthquakes and super volcanoes and incredibly large lava flows catastrophically occurred as the crust readjusted to new pressures. And the cycle continues.
Likely the whole Universe, in some way, is expanding and creating new mass over time, and if we fit back into a thimble 13.7 Billion years ago, there wasn’t as much mass and matter then, as there is now.