At first glance, dolphins, sharks, and whales all cut similar figures as they glide through the ocean: sleek fins, smooth ...
A dolphin breaking the surface for air can seem like a reminder of its mammalian past. But evolution is not nostalgia. The same body that still needs oxygen from the atmosphere is also one of the ...
Life around the ocean surface can appear strangely similar from a distance. A dorsal fin cuts through the water, a dark body ...