From my shallow knowledge when I was a student I though humans invented but I didn’t know much. With time I started to understand and to know that there are more and more and much more left for future generations to do. Our collective knowledge are not only growing but are constantly changed, replaced and renewed. 

We invaded much of the earth’s surface but still much left and we started to invade the sea but even much more interesting is to move from its surface to the bottom.

http://www.shimz.co.jp/english/theme/dream/oceanspiral.html