How Do We Build Underwater? From 50-km-long tunnels to deep-sea oil rigs, underwater construction is one of engineering’s ...
The vast majority of our planet’s oceans remain unexplored, hiding secrets that challenge everything we thought we knew about human history and geology. Every so often, sonar technology or daring deep ...
When sonar first picked up a massive, stair‑like object on the floor of the Baltic Sea, the image looked less like geology and more like a movie prop. The structure’s circular outline, sharp edges and ...
According to the team who found it, the structures were an ancient urban complex that sank into the ocean 6,000 years ago.