Fifty percent of the United States of America is underneath the ocean. And we have better maps of Mars than those areas.
Robert BallardEverything I'm going to present to you was not in my textbooks when I went to school ... not even in my college textbooks. I'm a geophysicist, and [in] all my Earth science books when I was a student - I had to give the wrong answer to get an A.
Robert Ballard