Robert Ballard: Exploring the ocean's hidden worlds

He reminds me of Dawkins in the way he can captivate young people. We need more guys like that doing public service and involving youngsters.

This video never gets old.

He's interesting and his obvious excitement is contagious.

wait wait wait.. i have a question wut is under the united states is it pure rocks or is it water like were floating wut is under europe asia africa south america ANTARTICA wut is under everything cuz i want to know:)

There is no water underneath the continents in terms of a sea, but the rock itself does contain large quantities of water in microscopic pores. The continental plates are mostly granitic rock, and they essentially float on heavier basaltic rock, of which the sea floor is mostly made (though with sediment on top of it). The seafloor is created at the midocean ridges that he talked about, and subducts underneath the continental plates at the edges, because it is heavier. Hope that helps.

k thanks whole lot of scientific stuff lol but ty that helped

Ask a science question on a science video board and that's what you get. }|:op

this right here is really interesting to me very interesting

if he is ur great great grampa he should be dead by now or ur mom gave birth to u way to early...

@TEDTalksDirector (Chris Anderson?):
Google Ocean? Brilliant idea! Google Earth is a brilliant interface to imagery of Earth's surface and Microsoft's "WorldWide Telescope" is a less-developed interface to imagery of our skies, but we'll want a comprehensive interface for the new imagery of our ocean depths. Google's probably best equipped to do it, but an amateur programmer could do it in his spare time once the images are freely available with proper context info. Might even do it myself...