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The Deepest Map: The High-Stakes Race to Chart the World's Oceans

(Paperback)

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Publishing Details

Full Title:

The Deepest Map: The High-Stakes Race to Chart the World's Oceans

Contributors:

By (Author) Laura Trethewey

ISBN:

9780063099968

Publisher:

HarperCollins Publishers Inc

Imprint:

HarperPaperbacks

Publication Date:

1st November 2025

Country:

United States

Classifications

Readership:

General

Fiction/Non-fiction:

Non Fiction

Other Subjects:

Oceanography (seas and oceans)
The Earth: natural history: general interest

Physical Properties

Physical Format:

Paperback

Number of Pages:

304

Dimensions:

Width 135mm, Height 203mm

Weight:

454g

Description


A SCIENCE NEWS MAGAZINE BEST BOOK OF 2023

A GLOBE AND MAIL BEST NONFICTION BOOK OF 2023

Should be required reading. . . . A gripping and all-too-timely account of what in more ways than one is turning out to be a very costly and questionably necessary race to the bottom. . . . Trethewey rises to the occasion here, relating in absorbing detail the ebb and flow of conflicting interests that tussle down among the vents and ridges of the hadal zone. It is all highly readable, and it is all deeply ominous. Simon Winchester, New York Times Book Review

The dramatic and action-packed story of the last mysterious place on earththe worlds seafloorand the deep-sea divers, ocean mappers, marine biologists, entrepreneurs, and adventurers involved in the historic push to chart it, as well as the opportunities, challenges, and perils this exploration holds now and for the future.

Five oceansthe Atlantic, the Pacific, the Indian, the Arctic, and the Southerncover approximately 70 percent of the earth. Yet we know little about what lies beneath them. By the early 2020s, less than twenty-five percent of the oceans floor has been charted, most close to shorelines, and over three quarters of the ocean lies in in what is called the Deep Sea, depths below a thousand meters. Now, the race is on to completely map the oceans floor by 2030an epic project involving scientists, investors, militaries,and private explorers who are cooperating and competing to get an accurate reading of this vast terrain and understand its contours and environment.

In The Deepest Map, Laura Trethewey documents this race to the bottom, following global efforts around the world, from crowdsourcing to advances in technology, recent scientific discoveries to tales of dangerous dives in untested and costly submersibles. The lure of ocean exploration has attracted many, including the likes of James Cameron, Richard Branson, Ray Dalio, and Eric Schmidt. The Deepest Map follows a cast of intriguing characters, from early mappers such as Marie Tharp, a woman working in the male-dominated fields of oceanography and geology whose discoveries have added significantly to our knowledge; Victor Vescovo, a man obsessed with reaching the deepest depths of each of the five oceans, and his young, brilliant, and fearless mapper Cassie Bongiovanni; and the diverse entrepreneurs looking to explore and exploit this uncharted territory and its resources.

In The Deepest Map, ocean discovery converges with humanity's origin story; in mapping the ocean floor, scientists are actively tracing our roots back to the most inhospitable places on earth where life beganand flourished. But for every conservationist looking to protect the seafloor, there are others who see its commercial potential. Will a new map exacerbate pollution and the degradation of this natural resource How will the race remake political power structures in years to come Trethewey probes these questions as countries and conglomerates wrestle over the riches that may lie at the bottom of the sea.

The future of humanity depends on our ability to protect this vast, precious, and often ignored resource. A true tale of science, nature, technology, and an extreme outdoor adventure The Deepest Map illuminates why we loveand fearthe earths final frontier and is a crucial addition to the increasingly urgent conversation about climate change.

Reviews

"An engrossing look at deep-sea exploration. Essential reading for environmentalists, armchair adventure divers, and those who care about the worlds oceans." Kirkus (Starred Review) "There is no doubt in my mind that the ocean plays the most massive role in our past, present, and futurefrom transportation to planet health to long term sustainability.The Deepest Mapshines a light on this massive yet ever-changing force and helps bring into focus so many unanswered questions, while giving us a beautiful reminder of how important it is to educate and protect these waters to the best of our abilities." Garrett McNamara, Big Wave surfer, co-creator of the documentary series100 Foot Waveand author ofHound of the Sea [The] questions Trethewey encourages us to ponder inThe Deepest Mapare not centered around whether to map and explore the deep sea, theyre about how that exploration happens, who controls it, and what it leaves behind.The deep sea could become our next Amazonheavily plundered and degraded. Or it could become our next Antarctica, governed by international treaties that protect it in the name of science. Tretheweys thorough accounting of our knowledge of and relationship to this last truly mysterious place on Earth can only help us along the right path. Atlantic Books Review "Wow, what a great adventure story.Shipwrecks, octopus gardens, coral reefs as tall as the Empire State Building, 11,000 year-old sponges, deep sea robotsits a trip to another world, right here on Earth.This is not just a book about the epic quest to map the ocean floor, but an exploration of the mysteries and life of a planet we hardly know. The Deepest Mapis one of those rare books that will change the way you see our world." Jeff Goodell, author ofThe Water Will Come "Tretheweys sharp eye for character brings out the humanity in the marine moonshot. Its worth exploring." Publishers Weekly "A riveting ocean of a book, packed with gripping adventures, high-stakes exploration and political intrigue. Trethewey leads us to the bottom of the sea and deftly shows why it all matters so much." Helen Scales, author ofThe Brilliant Abyss "The Deepest Mapis a fascinating, poetic love letter to our planet and to the scientists and explorers risking their lives to understand its unconscious. With exhaustive reporting, Trethewey takes us on an awe-inspiring and humbling adventure that makes us realize how much we still have to learn about our home." Jaimal Yogis, author ofAll Our Waves Are Water "This adventure on the high seas follows scientific explorers who are charting the seafloor in exquisite detail. But as with any exploration of uncharted territory, mapping the bottom of the oceanrisks spoiling a place largely untouched by humans." Science News Magazine "A gripping, timely account of the worlds pushby inventors, scientists, business people and governmentto map the oceans floor." The Globe and Mail

Author Bio

Laura Trethewey is an award-winning ocean and environmental journalist and author of The Imperiled Ocean: Human Stories of a Changing Sea. Her writing has appeared in the The Atlantic, Smithsonian Magazine, Courrier International, The Guardian, The Walrus, Toronto's Globe and Mail, Hakai Magazine, and Canadian Geographic. She received a Master of Fine Arts in Creative Writing from the University of British Columbia and won Canada's Writers' Trust Rising Star Award in 2020.

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