Scientists scanning the seafloor discover a long-lost Stone Age ‘megastructure’
One night, in the Bay of Mecklenburg, off the coast of northern Germany, the students fired up the echosounders and mapped a swath of seafloor. “The next day, we downloaded the data,” says Geersen. “And it was then when we were sitting together, we saw that there was something on the seafloor. It was something …