Many boats have a "bulb keel," an underwater protrusion that might seem odd at first glance. This bulb at the bottom of a keel acts to lower the center of gravity, significantly improving stability and reducing roll while sailing. This design, often seen in racing yachts, can also reduce drag for better performance. What's fascinating is that this concept mimics the functionality of a fin whale's bulbous head, illustrating biomimicry in marine engineering. Share your own surprising boat fact or insight – what have you observed that might awe others?