On the Air: May 21, 2017

In the early months of World War I, German submarines were sinking Allied shipping at an alarming rate. There was no way to detect the U-boats when they were submerged, so they could operate with little fear of loss.

Allied powers quickly set out to change that. They eventually developed an early version of sonar -- a technology that uses sound waves to detect underwater targets.

In Print: May 1, 2017

Although they frequently swim with their massive mouths wide open to feed, basking sharks don’t look like the Jaws-type predator most people think of when they imagine a shark. The biggest of these 4-ton fish are just a few feet shorter than a typical school bus. Their gaping mouths reveal their gills and filter-feeding structures, which together resemble the inside of a rib cage. Basking sharks are the second largest shark in the world and just like their bigger cousins, whale sharks, they are filter feeders. Their hundreds of tiny teeth are too small to do much damage.