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Mysteries of the Deep: How Seafloor Drilling Expeditions Revolutionized Our Understanding of Earth History

By (author) James Lawrence Powell

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A groundbreaking chronicle of scientific ocean drillingâ€”a crowning achievement of the twentieth centuryâ€”and how it shaped our knowledge of Earth's past. Under the radarâ€”or, rather, sonarâ€”of most people and many scientists, for the last six decades ships have plied the worldâ€™s oceans, mining the seafloor for its secretsâ€”and quietly resolving confounding geological mysteries. Continental drift and plate tectonics. The origin of the HawaiÊ»ian Islands. The erstwhile disappearance of the Mediterranean. The mystery of the ice ages. All are part of the story told by deep-sea drillingâ€”and chapters in the history that unfolds in Mysteries of the Deep. In a series of vignettes ranging from the voyage of the HMS Challenger in the 1870s to the adventures of research ship ChikyÅ« in the 2020s, James Powell recounts the surprises the seafloor has yielded to the probing of scientists. With a global, sometimes even extraterrestrial scope and a scientific reach that extends to every corner of geology and astrobiology, Powellâ€™s work recounts how cores extracted from the ocean floor have: Â·Â Â Â Â Â produced insights into microbial life on Mars and the end of dinosaursâ€™ tenure on Earth Â·Â Â Â Â Â demonstrated that astronomical cycles control many geological events, and even human evolution Â·Â Â Â Â Â used a past episode of global warming to reveal the peril of high temperatures today Â·Â Â Â Â Â shown that global warming could melt enough Antarctic ice to drown the seacoasts The mysteries uncovered by deep-sea drilling, and covered by Powell in this eye-opening book, are many and various, often surprising and sometimes alarmingâ€”consequential not just for the science of the seafloor, but for how we learn about our planet's past and what we can do about its future.

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