For centuries, shipworms have vexed mariners by boring into – and consuming – the hulls of wooden ships and boats. Soon, though, we may actually be eating those "worms," as they have successfully been farmed for the first time. Scientifically known as teredinids, shipworms are actually a type of bivalve mollusk. This means they're related to clams, mussels and oysters. Because they spend their lives protected inside the wood that they eat, however, they only have a tiny shell at their front end, where it aids in the wood-boring process. In the Philippines, shipworms are already wild-harvested and sold as...