![Here Be Monsters show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/046/465/small/herebemonsters.png)
Summary: Most of the ocean floor has never been mapped in detail. Some scientists are trying to change that, using sonar to see what satellites can’t.
Summary: Most of the ocean floor has never been mapped in detail. Some scientists are trying to change that, using sonar to see what satellites can’t.