Millions of mystery holes at the bottom of the North Sea are not what scientists thought they were

Holes in the seafloor off the coast of Germany looked like those associated with methane. They might actually be the work of porpoises looking for eels.

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New Zealand , Ireland , North Sea , Oceans General , Oceans , Jess Hillman , Communications Earth Environment , Kiel University , Communications Earth , Jens Schneider ,