Mud is messy. For some, it's a plaything. To many, it can mean real hardship. Mud, though, is often overlooked, particularly when it lies out of sight. Deep down at the bottom of the sea, it is ...

Mud volcanoes and an “ultra-deepwater” river are among the surprises scientists found while building a high-resolution 3D map of the northern Gulf of Mexico.

Mud volcanoes and an “ultra-deepwater” river are among the surprises scientists found while building a high-resolution 3D map of the northern Gulf of Mexico.