* Geological Processes: While the Earth's surface is constantly changing due to plate tectonics, volcanoes, and erosion, these processes don't significantly alter the planet's overall size.
* Internal Structure: The Earth's core, mantle, and crust are in a state of dynamic equilibrium. Any significant change in size would require massive energy inputs or outputs that are not currently occurring.
So, the Earth's size 1 million years ago was essentially the same as it is today.
However, there are some subtle changes over very long periods:
* Very Gradual Expansion: Some scientists believe that the Earth's size may have very gradually increased over billions of years due to the decay of radioactive elements in the Earth's interior. However, this expansion is incredibly slow and insignificant on a human timescale.
* Past Impacts: Giant asteroid impacts in the Earth's early history could have slightly changed the planet's size, but these were one-time events and don't affect the long-term trend.
In conclusion, while the Earth's surface features have changed dramatically over the past million years, the planet's overall size has remained remarkably stable.
