Which cats enojoy swimming?

A fizz. When a piece of iceberg ice melts, it makes a fizzing sound called "Bergie Seltzer". This sound is made when the wa­ter-ice in­ter­face reaches com­pressed air bubbles trapped in the ice. As this happens, each bubble bursts, making a 'pop­ping' sound. The bubbles contain air trapped in snow layers very early in the history of the ice, that even­tu­al­ly got buried to a given depth (up to several kilo­me­ter­s) and pres­sur­ized as it trans­formed into firn then to glacial ice.

In Antarc­ti­ca. With a salinity level of over 40%, Don Juan Pond is the saltiest of the Antarc­tic lakes. This salinity allows the pond to remain liquid even at tem­per­a­tures as low as −50 °C (−58 °F) due to the in­ter­fer­ence of salts with the bonding of water mol­e­cules. Don Juan Pond was dis­cov­ered in 1961 by George H. Meyer.

68°C (154.4°F). The boiling point of water depends on the pres­sure. On top of Mount Everest, the pressure is about 260 mbar (26.39 kPa) and the boiling point of water is 69 °C. (156.2 °F). In con­trast, water can still remain liquid near deep hy­dro­ther­mal vents, even if the tem­per­a­ture is very high.

Volga. The Volga is the largest river in Europe in terms of length, dis­charge, and wa­ter­shed.