Follow the Whale

How do you track bowhead whales that spend much of their time in remote, unobserved, icy waters? Answer: with a coalition of agencies deploying all the tools of modern technology, including sonar and satellite transmitters fired by air gun into the whale's wall of blubber. This is an interesting look at how scientists find out what an enigmatic animal (bowheads may be the longest-lived vertebrates on Earth) is up to.