Freeman Dyson is one of the preeminent minds in science. He is a 91 year old physicist and Robert Oppenheimer and Neils Bohr were on his Phd review panel. Here is a very interesting recent interview. Conversations That Matter – Freeman Dyson.
And a newer interview. He is not a global warming fan Note that he is a die hard liberal, registered Democrat who voted for Obama twice but he says Obama has climate change all wrong. He thinks the climate models have too many assumptions and fudge factors in them to be useful.