‘The Deepest Map’ explores the thrills — and dangers — of charting the ocean

Laura Trethewey's book explores humankind’s quest to map the seafloor, framed around Cassie Bongiovanni's adventures.

The Deepest Map is about what can go wrong when explorers explore the oceans.

The book is about mapping the ocean and how it can turn exploration into exploitation.

Seabed 2030 ’s mapping effort may help people see that “the weird, wonderful deep-sea world is not a blank space, another frontier to use up and throw away,” says Trethewey .

The map could lead to the destruction of delicate, mostly unknown habitats.