01:42
Over the Edge: Oceanic Ridge System, The
Perhaps the most striking feature that characterizes the deep ocean floor is the vast oceanic ridge system that encircles the Earth along tectonic plate boundaries.
00:58
Over the Edge: Deep Ocean Floor, The
Although it comprises more than half of Earth's surface area, the deep ocean floor was a region of near total mystery until fairly recently. Even now, efforts to map ocean basins are in their infancy.