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From ancient diving bells to the groundbreaking descent of the Mariana Trench, in this episode, we'll uncover tales of bravery, innovation, and the pursuit of knowledge beneath the waves.

• Ancient history of exploring the ocean's depths
• Aristotle's theoretical diving concept in the 4th Century BC
• Early diving bell inventions and Alexander the Great myth
• Magellan's attempt to measure ocean depth in 1521
• The invention of the first submarine by Cornelis Drebbel
• David Bushnell's "Turtle" and its military attempts
• HMS Challenger's oceanographic expedition reveals deep-sea life
• Discovery of the Mariana Trench's Challenger Deep
• First manned descent into Mariana Trench in 1960
• Current understanding and mystery of Earth's deep oceans

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Keywords: Learn English, vocabulary, lessons, idioms, aprende inglés, idiomas, aprender inglês, apprendre l'anglais, imparare l’inglese, ingilizce öğren,英語を習う, تعلم الإنجليزية