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This animal… can hold its breath… for over an hour. No oxygen. No air. Just one dive. It’s a sperm whale. And it’s built for the deep. Before diving… it takes a massive breath. Filling its lungs… and storing oxygen in its blood and muscles. Far more than humans. Then it dives. Deep into the ocean. Thousands of meters down. Where light disappears. And pressure crushes. Its heart rate slows. Its body conserves oxygen. Sending it only where it’s needed most. Brain. Vital organs