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I recently visited a festival of philosophy and music, , on London’s Hampstead Heath. I hadn’t been before, but I was chairing an event on “Adventures in Space”, with astrophysicists Avi Loeb and Matt O’Dowd and philosopher Carol Cleland on my panel.

They were brilliant – there were some great clashes between Loeb and O’Dowd about the search for aliens, while Cleland was thought-provoking on Homo sapiens‘s (sometimes destructive) drive to find the next thing.

There was much more on offer, too, as sessions (pictured above) spanned everything from quantum computing, run by physicist Jessica Wade,…