Lord Rees, Astronomer Royal and former Master of Trinity College Cambridge, has just published a new book called ‘If Science is to Save Us’, which he discussed at a Topos Institute seminar at the Royal Society in London on Wednesday 27th September. Our 'Thought' for this week reflects on his analysis of the mega-challenges which confront us, picking up links to commentaries on his themes which we have provided over recent years, and which are accessible from the website commentary link below.

Background music: 'Ether Oar' by The Whole Other 

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