History's Greatest Mysteries: History's Secrets of the Air and Sea

History's Greatest Mysteries: History's Secrets of the Air and Sea — page 1
CHAPTER 1 UNCHARTED TERRITORY For humans the last century and a half has been transformative In 1903 we took our first flight in an airplane In 1969 we walked on the moon And yet while we’ve used boats for thousands of years just about five percent of the seafloor has WATCH A VIDEO HERE 4