In the 1939 neuroscientists began cutting living human brains in two in order to treat certain types of epileptic seizures. Subsequent experiments on those patients gave science an unnerving window into the nature of human consciousness. It turns out that there might be more versions inside of your own brain than you might be comfortable with.

CORRECTION: In this piece I stated each eye sent information to alternate hemispheres. This was not correct. Instead, as the diagram shows, the eyes divide the field of view into left and right sides and transmit each side to alternate hemispheres. The net effect is still the same as I explained in the video. Thanks to all the people who pointed out my error.

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How Ten Years of the Wim Hof Method Changed My Life
   • How 10 Years of the Wim Hof Method ch...  

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Split brain behavioral experiments (Video of Joe)
   • Split brain behavioral experiments  

Summary of Robert Sperry's Nobel Prize Winning Split Brain Experiments
https://embryo.asu.edu/pages/rogersp...

One Brain. Two Minds? Many Questions
https://www.ncbi.nlm.nih.gov/pmc/arti...

Split Brain: Divided perception but undivided consciousness https://pubmed.ncbi.nlm.nih.gov/28122...

Interaction in isolation: 50 years of insights from splitbrain research
https://pubmed.ncbi.nlm.nih.gov/29177...

The other side of the brain: The politics of split brain research in the 1970s1980s
https://psycnet.apa.org/record/20162...

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