Putin: We have no intention of attacking Europe
Polish swimmer Bartłomiej Kubkowski swims across the Baltic Sea in 55 hours
'Sea cannibal' alarm in the Baltic Sea: Invasive comb jelly puts pressure on native species
Why the Baltic Sea is different: Its low-salinity water, shallow structure, importance to countries, and the legend of amber
Poland intercepts Russian aircraft for the third time in a week
Russian aircraft alarm in the Baltic Sea: German fighter jets scrambled