Days before his death, theoretical physicist Stephen Hawking finished what would be his final research paper. Learn about his last take on the multiverse in this episode of BrainStuff.Learn more about advertising on the HowStuffWorks podcasts at www.howstuffworks.com/advertisers.htmAnd to learn about your ad choices when listening to podcasts, visit https://www.howstuffworks.com/privacy.htm#ad-choices
