Deep beneath the ocean’s surface, scientists have installed a variety of research equipment – for example, special hydrophones to record the sounds the sea makes. Yes, if you thought that everything was quiet underwater, you were definitely wrong. Many sea creatures make different sounds – and a special place among these animals is occupied by whales and their famous “songs.”

Blue whales – the largest animals that have ever existed on our planet, are no exception. For centuries, the ocean has been filled with their songs, produced for communication, mating games, navigation – and for other purposes. But today, scientists are ready to sound the alarm – it turns out that over the past decade, whales have nearly gone silent. But why?

Blue whales have been singing their songs in the ocean fo

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