IN THE BEGINNING, something happened. We are not quite sure what it was. Planet Earth’s beginning was some four and one-half billion years ago. The beginning of the beginning was sometime before that. However and whenever we define the beginning, we know there has been continual change ever since.
At several times in the evolution of our cosmic home, much of the land area of the planet was one large mass. Slowly over the unknown eons, this land mass split apart, came together and reformed in different configurations. This occurred most recently about three hundred million years ago.