A blog post in Scientific American, well worth reading. Rovelli is a researcher in Loop Quantum Gravity.
Horgan: Do multiverse theories and quantum gravity theories deserve to be taken seriously if they cannot be falsified?
Horgan: What’s your opinion of the recent philosophy-bashing by Stephen Hawking, Lawrence Krauss and Neil deGrasse Tyson?
Rovelli: Seriously: I think they are stupid in this. I have admiration for them in other things, but here they have gone really wrong. Look: Einstein, Heisenberg, Newton, Bohr…. and many many others of the greatest scientists of all times, much greater than the names you mention, of course, read philosophy, learned from philosophy, and could have never done the great science they did without the input they got from philosophy, as they claimed repeatedly. You see: the scientists that talk philosophy down are simply superficial: they have a philosophy (usually some ill-digested mixture of Popper and Kuhn) and think that this is the “true” philosophy, and do not realize that this has limitations.
Horgan: Can science attain absolute truth?
Rovelli: I have no idea what “absolute truth” means. I think that science is the attitude of those who find funny the people saying they know something is absolute truth. Science is the awareness that our knowledge is constantly uncertain. What I know is that there are plenty of things that science does not understand yet. And science is the best tool found so far for reaching reasonably reliable knowledge.
Horgan: Do you believe in God?
Rovelli: No. But perhaps I should qualify the answer, because like this it is bit too rude and simplistic. I do not understand what “to believe in God” means. The people that “believe in God” seem like Martians to me. I do not understand them. I suppose this means that I “do not believe in God”. If the question is whether I think that there is a person who has created Heavens and Earth, and responds to our prayers, then definitely my answer is no, with much certainty.
Horgan: Are science and religion compatible?
Rovelli: Of course yes: you can be great in solving Maxwell’s equations and pray to God in the evening. But there is an unavoidable clash between science and certain religions, especially some forms of Christianity and Islam, those that pretend to be repositories of “absolute Truths.”