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.
00:56
Over the Edge: Submarine Canyons
A submarine canyon is a steep, V-shaped valley that cuts across the edge of the continental shelf and slope. It acts as a funnel, carrying sediment down to the abyssal plain.