Polish endurance swimmer Bartłomiej Kubkowski completes what is described as the first swim across the Baltic Sea from Sweden to Poland, covering about 160 kilometres in roughly 55 hours. Euronews reports that the swimmer makes the crossing from Sweden to his home country and finishes after more than two days in the water. PravdaReport, citing RMF24, adds that the swim is done as a nonstop effort without sleeping and without making contact with an accompanying support boat, in line with marathon open-water rules. Both accounts describe the distance and the overall time taken, presenting the feat as an endurance record for this specific route. PravdaReport also says the attempt is linked to a charity campaign for cancer patients, with proceeds reported in the hundreds of thousands of złoty. The sources agree on the core details of the route, distance and duration, while providing additional context on the charity component and the specific non-contact support-boat rules.