Collection · 22 September 2026

An Octopus Has About 500 Million Neurons, and They Are Not All in Its Head

Name: An Octopus Has About 500 Million Neurons, and They Are Not All in Its Head
Uploaded: 2026-09-22
Duration: 9 min 24 s
Description: An octopus has around 500 million neurons, and more than half of them are not in its brain but spread down its eight arms.

An octopus has around 500 million neurons, and more than half of them are not in its brain but spread down its eight arms.

Sources

The full list of sources sits under the video on YouTube.

Watch on YouTube

New episode, new design.

Hear when a new story and its shirt come out.

Challenger Deep · 10,935 m down · the deepest known point of the ocean