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Sea turtle shells record life history layer by layer over many years, clearly revealing diet, stress, movement, and ocean changes.
A University of Washington-led team discovered that modern Nautilus and Allonautilus species inhabit deeper waters than their extinct ancestors did over 500 million years ago, with juveniles living at twice the depth of mature adults. That newly documented split turns these ancient survivors into moving targets across the reef slope, not fixed relics of deep time. Shells hold clues
Neanderthals hunted turtles but did not rely on them for food - they cleaned and reused the turtle's shells as tools.
Sea turtle shells balance strength, flexibility, and speed to ensure survival. A new study reveals surprising differences among species.
Tiny shells, massive climate role The signature shell-builders in the ocean are organisms that precipitate calcium carbonate (CaCO₃). These calcifying plankton build minute shells out of minerals. As they live, die, and sink, their shells influence ocean alkalinity, the transport of carbon into abyssal depths, and thus the global climate.
New research suggests oysters may rely on hidden microbes to help build their shells and maintain chemistry as oceans grow more acidic.