Schools on four Greek islands—Santorini, Amorgos, Anafi, and Ios—will remain closed until February 14 due to ongoing seismic activity. Since February 1, over 800 tremors have been recorded, with 11 ...

The ancient Romans were great builders, especially known for their aqueducts. These are still standing today because they were made with a special kind of concrete called pozzolanic concrete. This ...