In the mid-20th century, when people looked at a map of the world, they saw the familiar continents surrounded by vast, ...

The new map has also revealed an extinct mid-ocean ridge in the Gulf of Mexico and a huge rift scar in the South Atlantic Ocean formed by an ancient hotspot which cracked the planet's crust.

The image below shows a bathymetric map of the ocean floor, where pink denotes the shallowest water (continental shelves and ...

The map depicts the mid-ocean ridge zigzagging its way around the world. It looks like if you ran your fingers over the paper, you'd be able to feel where it rises and falls.

Topographic or satellite maps of Earth may reveal ridges and troughs that crisscross flat plains on the ocean floor, making it seem as though the entire ocean floor has been mapped out, Ferrini said.

NASA's Surface Water and Ocean Topography satellite, aka SWOT, has provided one of the most detailed maps of the seafloor ever created.

A newly-deployed satellite has created the most-detailed map yet of the ocean floor, finding hundreds of hills and underwater volcanoes that were previously missed.