Carl Sagan discusses the structure of the human brain and its immense complexity and potential.
posted by jonny 1 decade 7 years 3 weeks ago • 2,915 viewsDocumentaries - the truth and other entertainment
Created: 1 decade 7 years 2 months 1 week ago
Updated: 1 decade 4 months 4 weeks ago
Views: 10,774
Updated: 1 decade 4 months 4 weeks ago
Views: 10,774