" Signed by scientists including physicist Stephen Hawking in front of 60 Minutes cameras, it asserts that “humans are not unique in possessing the neurological substrates that generate consciousness” and that “nonhuman animals, including all birds and mammals, and many other creatures, including octopuses [italics added], also possess these neurological substrates. "

― Sy Montgomery , The Soul of an Octopus: A Surprising Exploration Into the Wonder of Consciousness