On the Air: August 30, 2015
Young loggerhead turtle with a solar-powered satellite transmitter.Credit: National Oceanic and Atmospheric Administration

One of the best ways for biologists to learn about marine life is to tag along for the ride -- to plunge into the ocean depths, or travel on a migration that may cover thousands of miles. Since it’s hard to know how many sandwiches to pack for such a trip, though, scientists use proxies: satellite trackers, video cameras, and other devices.

In Print: September 1, 2015
The white object at the tip of this sea star’s arm is being ejected from its body. Credit: University of Southern Denmark

Imagine that every time a veterinarian microchipped a dog or cat, the animal found a way to expel the microchip from its body. It turns out that is exactly what a sea star (aka starfish) does with a foreign object in its body. It pushes the object to the tip of an arm and then ejects it from its body.