Marine mammals may look like big fish, but Bill Nye the Science Guy explains how they're more like humans. Listen closely to hear mammals communicate underwater, and find out how our "relatives at sea" have found ways to live in oceans all around the world. This live-action, fast-paced program also features comedy, music videos, interviews with real scientists and hands-on experiments to make the concepts presented understandable and fun. Disney Educational Productions. c 1996, 2004 Disney.