During the Ice Ages, the sea level of the Atlantic Ocean dropped so much that the Baltic Sea, the Gulf of Bothnia and the Gulf of Finland disappeared, and the countries now surrounding them, including Germany, Poland, the other Baltic countries and Scandinavia, were directly joined by land.
Selama Zaman Es, permukaan laut dari Samudera Atlantik turun begitu banyak bahwa Laut Baltik, Teluk Bothnia dan Teluk Finlandia menghilang, dan negara-negara sekarang sekitar mereka, termasuk Jerman, Polandia, negara-negara Baltik lainnya dan Skandinavia, yang langsung bergabung dengan tanah.