Eminent cosmologists Sean Carroll and Luke Barnes join Justin for an extended edition of the show debating naturalism, Theism, Big Bang cosmology and fine tuning.

Sean, an atheist astrophysicist and author of 'The Big Picture: on the origins of life, meaning and the universe itself' argues that naturalism best fits with our scientific understanding. Luke, a Christian astrophysicist and co-author of 'A Fortunate Universe: life in a finely tuned cosmos' argues that Theism makes better sense of the evidence.

For Sean Carroll: https://www.preposterousuniverse.com/

For Luke Barnes: https://afortunateuniverse.wordpress.com/about-the-authors/

Get signed copies of Unbelievable? the book and audiobook: http://www.unbelievablebook.co.uk

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For more faith debates visit http://www.premierchristianradio.com/Shows/Saturday/Unbelievable

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