Eager to learn more about sharks? There's an app for that! Researchers at Stanford University worked with scientists to create the Shark Net app to help track great white sharks off of California's coast.

Do you collect postage stamps? Look at these scuba diving and marine life postage stamps from around the world.

We've put together a photo gallery of 15 wrecks — some open to scuba divers and some not; some of their stories known to us and some not — that move us.