thorium can give humanity clean, pollution free energy | kirk sorensen | tedxcoloradosprings Published 9 years ago • 1.6M plays • Length 16:07 Download video MP4 Download video MP3 Similar videos 10:03 thorium: kirk sorensen at tedxyyc 17:42 a theory you've never heard of | michael robinson | tedxuniversityofhartford 21:39 12,419 days of strandbeest evolution 25:00 lftr (thorium-msr) - kirk sorensen of flibe energy @ university of tennessee, knoxville