Octopus arms can make decisions on their own

The remarkable distributed nervous system of the octopus is discussed at an astrobiology conference.

Image source: Kondratuk Aleksei/Shutterstock
  • Unlike vertebrates, two-thirds of an octopus' neurons are in its tentacles.
  • Tentacles respond to the surrounding environment without help from the head's brain.
  • If something this weird is here on our own Earth, what could be out there in space?
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