TED-Ed Lesson: 20 million years ago, the ocean housed a creature so colossal that its stomach could reach volumes of almost 10,000 liters— big enough to fit an entire orca. It was the megalodon, the biggest shark to ever live. So, what was it like when megalodon ruled the seas? And what brought this formidable predator to extinction? Jack Cooper and Catalina Pimiento investigate.