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  • Muse: The magazine of science, culture, and smart laughs for kids and children

    Fathoming the Ocean

    Jan 01, 2020 3 minutes
    by Peg Lopata

    1521

    Ferdinand Magellan attempts to measure the depth of the Pacific Ocean. He uses a 2,400-foot (about 730-m) weighted line but does not touch bottom. This method to reach the bottom of the sea uses what is called a sounding line.

    1620

    Cornelius Drebbel, Dutch engineer and inventor, builds the first submarine.

    1690

    English scientist Edmond Halley builds the first diving bell, a chamber to transport divers into deep water with a continuous air supply.

    1872–1876

    Scientists aboard the British expedition ship HMS Challenger determine ocean depths by means of wire-line soundings and discover

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