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SUBSCRIBE: https://www.youtube.com/c/ngcpl?sub_c... We invite you to the extraordinary world hidden at the bottom of the oceans. We accompany research expeditions, using sonar to map mysterious wrecks, sunken ancient cities and remote corners of the underwater world. Using computer-generated maps and three-dimensional models, we explain the causes of ancient sea disasters and try to better understand the world around us. Broadcast dates and reruns can be found at https://www.natgeotv.com/pl If you prefer to watch episodes online, visit ncplusgo.pl or player.pl. Join us on Facebook: / ngcpl Watch Nat Geo Wild Instagram: / natgeowildpolska E02