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A Tag Fit for a Porpoise

A Tag Fit for a Porpoise

In 2003, Stacy DeRuiter arrived as a graduate student at Woods Hole Oceanographic Institution (WHOI), where a new device developed…

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The Deepest Divers

The Deepest Divers

For years, sperm whales and elephant seals were thought to hold world records for holding their breath under water. But…

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Run Deep, But Not Silent

Run Deep, But Not Silent

For the first time in history, we can accompany a whale on its dive, hear what it hears, and observe its normal, natural, previously hidden behavior in the depths. Working closely together, scientists and engineers have created an innovative new device—the digital acoustic recording tag, or D-tag. It attaches to a living whale and records nearly everything that happens on its dives, without disturbing the animal.

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