On the Air: February 18, 2018

One of the most geologically active regions on Earth is at the western edge of the Pacific Ocean, along a chain of volcanic mountains both above and below the ocean surface. The Mariana Arc includes more than 60 underwater volcanoes, known as seamounts. And scientists have seen big changes along that arc in recent years.

The activity is caused by the motions of two of the plates that make up Earth’s crust. One plate is plunging below the other. The intersection between them has created the deepest spot in the oceans, a canyon known as the Mariana Trench.

In Print: February 1, 2018

Most turtle-headed sea snakes throughout the Indian and Pacific Oceans have black-and-white banded bodies—unless they swim in city waters. Instead of the distinctive white rings around their bodies, the snakes that live closest to industrial areas have much darker bodies. In fact, turtle-headed sea snakes in the polluted waters around New Caledonia, in the Pacific, are often entirely black. These city sea snakes aren’t making a fashion statement. Having darker skin, scientists have learned, gives them an edge over their banded brethren when living near large human populations.