 In today's Business Daily, we're dipping beneath the waves to investigate something you might have been taking for granted, seaweed. For many of us, the term conjures up spindly kelp growing in the shallows. Or perhaps you're imagining the nori served in sushi restaurants worldwide. Proponents say global appetites for seaweed food products and dietary supplements are growing. But the real excitement is around some of the other things seaweed can do.