antennae

Its brain cavity, which is divided into segments, has revealed the ancestral “nub” of the specialist, segmented heads of modern insects, spiders and crabs that later evolved their various appendages, such as antennae, mouthparts and eyes.

But he decided to have surgery in 2004 which changed his life - and his senses - attaching an antennae to the back of his head, which transforms light waves into sounds.

He eventually persuaded anonymous doctors to operate, removing part of the back of his skull so the antennae could be implanted and the bone could then grow over it.

His partner, Moon Ribas, says in the film: "He is brave, he likes to do things differently", while he says his antennae "allows me to extend my perception of reality".

Harbisson explains in the film that post-surgery, he had five weeks of headaches, and it took him about five months to get used to the antennae.