The sperm whale’s brain is five times heavier than a human’s:
![](https://steemitimages.com/640x0/https://steemitimages.com/DQmVndswbkxdVDEiz2tym8J4XWKu8KFnnzC7kv87bg3jqet/emoji12.png)
The brain of a sperm whale – without the sperm whale(Wikipedia)
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