Despite all the deep-sea expeditions and samples taken from the seabed over the past 100 years, humans still know very little about the ocean's deepest reaches. And there are good reasons to learn more. Most tsunamis start with earthquakes under or near the ocean floor. The seafloor provides habitat for fish, corals and complex communities of microbes, crustaceans and other organisms. Its topography controls currents that distribute heat, helping to regulate Earth's climate. This year marked the 100th anniversary of the birth of Marie Tharp, a geologist and oceanographer who created maps that changed the way people imagine two-thirds of the world. Beginning in 1957, Tharp and her research partner, Bruce Heezen, began publishing the first comprehensive maps that showed the main features of the ocean bottom -mountains, valleys and trenches. As a geoscientist, I believe Tharp should be as famous as Jane Goodall or Neil Armstrong. Here's why.
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