Dolphins have larger brains than humans. Their brains are also very complex, especially in the sections that deal with problem-solving, emotions, and self-awareness. This means they are some of the smartest animals on Earth (besides humans).
Some of the biggest dinosaurs— like Stegosaurus —had very small brains compared to their body size. These giant dinosaurs could have had brains as small as walnuts!
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Leeches’ bodies are broken up into 32 internal segments. Each segment has its own mini brain!
Each of an ostrich’s huge eyes is bigger than its brain! That means its brain is pretty small. No wonder they run in circles to avoid predators.
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