The Panama Canal provides a crucial shipping link between the Atlantic and Pacific oceans.
From the top of the hill we could see the ocean far away and, in the middle distance, the village.
The survival of whales is intimately bound up with the health of the ocean.
Such flows occur commonly in nature, examples being katabatic winds and turbidity currents in the oceans.
The developers believe that all kinds of robotic creatures will explore the oceans and send back information.
Here are figures relating to oceans and mountains but nothing on lakes and rivers.
