| 1 | Humans don't have the largest brains in the world -- those belong to sperm whales. | |
| 2 | The irony is that sperm whales can thank oil for their species's survival. | |
| 3 | The irony is that sperm whales can thank oil for their species's survival. | |
| 4 | And of course this will impact up the food chain, to fish and even sperm whales who dive deep to graze the ocean floor. | |
| 5 | First they chased down slower whales such as rights, humpbacks, and sperm whales. |
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