In October 2012 I started a thread called "Life On Other Planets", however it was actually about the need for humans to get off this planet and establish itself on another planet. I was told I read too many comic books ^.^ but actually I suggested that we had maybe 1,000 years to do the job.
I think Hawkings suggestion of 100 years is ridiculous (I mean wh the hell knows when the threrats will emerge?). However I bet Hawkings is not told he has been reading too many comics ^.^