July 6, 2018 — Four years ago, Lydia, a 14 ½-foot, 1-ton great white shark almost made history when she swam over the Mid-Atlantic Ridge in March of 2014, a submerged mountain chain that runs from the Arctic Ocean to the southern tip of Africa, and entered the eastern Atlantic.
No other great white had made a documented Atlantic crossing and, while she ultimately turned back 800 miles short of the Cornish coastline, scientists puzzled over why she made the trip at all.
Great whites are driven by the search for food, but a foray into the open ocean beyond the continental shelf, often portrayed as a desert relieved only by an occasional oasis, was baffling. Finding a possible answer took detective work, piecing together data from some of the most sophisticated technology strapped to two great whites, as well as a network of satellites and ocean-going robots. It’s a technique scientists hope will be a model for future research into the unknown worlds of the deep sea and for conservation efforts to protect that ecosystem.