The Baltic Sea continues to reveal its secrets in 2025, with several significant discoveries capturing the attention of scientists and historians alike. These findings range from ancient underwater structures to long-dormant life forms, offering new insights into the region's past and present.
Ancient Underwater Wall Discovered
In May 2025, an ancient stone wall, approximately 900 meters long, was discovered near Rerik, Germany. Estimated to be 10,000 years old, the structure dates back to the Mesolithic era. Researchers believe it may have been used as part of a hunting strategy, indicating advanced organization among early humans.
Historic Mine Discovery During NATO Operation
Also in May 2025, during NATO's Open Spirit 25 operation, a historic wartime mine was located in Lithuanian waters. The mine, found by the French warship FS Andromede, is one of over 200 mines, bombs, and other ordnance discovered in the area since 1997. This operation, involving thirteen NATO countries, aims to clear the seabed of remnants from past wars.
Revived Ancient Algae
In April 2025, scientists successfully revived 7,000-year-old algae from deep-sea sediments in the Baltic Sea. The algae, Skeletonema marinoi, were found in sediment cores from the Eastern Gotland Deep. These algae thrived after being revived, showing biological activity similar to their modern counterparts, opening new avenues for understanding marine history.