Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Published on Jan 21, 2012
And I give you 200 - 500 years. N.B. Our nearest star is 4.25 light years away, not 2. I also misrepresented Nick Bostron. He thinks there is 'not less than 20%' chance of mankind facing extinction in the 21st century.