On a remote coral reef near Papua New Guinea, endless streams of bubbles rise from cracks in the seabed into the shallow ...

In the early 20th century, sailors near Alaska reported seeing black bubbles seeming to boil out from the sea, each one the size of the dome of the capitol building in Washington, D.C. They weren’t ...

A stream of bubbles discovered seeping from an underwater volcano has sparked a worrying prediction. Scientists warn their ...