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Scientific sensations. The Baltic Sea: young and mysterious Why is the Baltic Sea considered the youngest and most mysterious on our planet? Is it true that it used to be a lake? What catastrophe caused the birth of the Neva River: a powerful earthquake or a comet fall? Where did UFOs and a huge wall come from at the bottom of the modern Baltic Sea? Where does the mini-tsunami that causes floods in St. Petersburg originate? How does a new complex of protective structures protect the city from flooding? Why are the beaches of the Baltic Sea filled with rotting algae? And how much do the burial sites of German chemical weapons poison the waters of the sea? 00:00 Introduction 00:57 Baltic UFO 03:59 How an ancient glacial lake became the Baltic Sea 08:59 Baltic Atlantis 13:18 St. Petersburg is the bottom of an ancient sea 16:00 Why the Baltic is fresh-salty 17:29 How the Neva appeared 26:57 Causes of floods in the northern capital 34:50 Toxic depressions with chemical weapons #sea #balticsea #baltic #lake #history #secrets #riddles