Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. The surface of the Earth is broken up into several large plates that are slowly shifting. About 250 million years ago, the plates on which the present-day continents rest were positioned quite differently , so that all the landmasses were clustered together in one supercontinent now dubbed Pangea . About 250 million years from now, the plates are again projected to reposition themselves so that a single landmass dominates. At that time, the Atlantic Ocean will be just a distant memory, and whatever beings inhabit Earth will be able to walk from North America to Africa .
Specific rights apply .