Posted 11 August 2015
What many are already calling the most convincing explanation of how a combination of the Sun, clouds and cosmic rays control Earth's climates is contained in this 52-minute YouTube presentation below by Professors Henrik Svensmark, Nir Shaviv and Jan Veizer. Then follows a link to an earlier Nigel Calder article on Svensmark's theories on clouds.
Link to YouTube here
Earlier 2012 comment on Svensmark theory here