Sea Urchins Are Basically Brains Covered in Spikes, Study Finds

November 12, 2025

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1 min read

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Gizmodo

The pointy shell of sea urchins hides a remarkably complex neural network that resembles the brains of vertebrates, new research suggests.

When it comes to taking hardcore evolutionary paths, some animals don’t hold back. The common sea urchin, as it turns out, really drives this point home—boasting a spiky nervous system scattered throughout its body, including light-sensitive cells re... [3188 chars]

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Source: Gizmodo

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