Synopsis

Whales, dolphins, otters, walruses, and orcas share a fundamental kinship with us: they are all mammals. Yet, their existence is defined by the ocean. Like us, they breathe air, possess hair, nurture their young with milk, and maintain a constant internal body temperature. Sustaining this warmth in the marine environment is no small feat. Water readily absorbs heat, making the ocean a remarkably cold place. Marine mammals have evolved diverse strategies to combat this chill. Whales, dolphins, an