The speed at which new ocean floor is created varies from one location on the ocean ridge to another ... At the East Pacific rise, which is pushing a plate into the west coast of South America ...

But how much and how fast will sea level rise? To answer this question, scientists have come up with two fundamentally different approaches to model sea level rise. The first is physical models ...

The height of the coral — which can grow only underwater — marks where the ocean once reached, and where it could someday rise again. Sarah Kaplan and Bonnie Jo Mount traveled to four islands ...