Theoretical physicist and best-selling author Dr Michio Kaku on why we should leave Earth. Full story: http://nzh.nu/c9Ub30mqjbT Subscribe: https://goo.gl/LP45jX Check out our playlists: https://goo.gl/Swd249 Like NZ Herald on Facebook: https://goo.gl/tUC4oq Follow NZ Herald on Instagram: ...