What Are Blue Whales Doing Underwater?

Blue whales may be the largest animals on Earth, but they’re also among the most mysterious. State-of-the-art tagging technology now allows researchers to collect new kinds of data about these incredible marine mammals. In Part Two of our four-part Giants of the Sea series, learn how high-resolution sensors are giving scientists a window into the daily lives of blue whales. Accelerometers, magnetometers, GPS trackers, and cameras are bundled on a suction cup-attached tag that allows blue whale researchers to track and study the animals underwater. The smaller sensors in this new tech provide a wealth of information in a tiny package.