Researchers in Japan are developing new medications by tapping into the rich resources of the sea. They've used a type of marine sponge to make a drug that's now used worldwide to treat breast cancer. A substance in crab shells has been found to help wounds heal faster. It's already being used on animals, and holds promise for treating atopic dermatitis in humans. Oceans have been called Earth's final frontier. Scientists believe they may yield yet more revolutionary medicinal substances.