It is telling and troubling that the annual climate talking-shop’s outcome did not even mention fossil fuels. We ask whether the COP process is still fit for purpose. Cryptocurrencies could be heading for an almighty fall: what would they take down with them? And the revealing vowels and diphthongs of whale communications. (Hear much more on animal communication in our series on “Babbage”: part 1 asks whether animals truly have language, and part 2 whether AI could translate it.) Additional audio courtesy of Project CETI. Get a world of insights by subscribing to Economist Podcasts+. For more information about how to access Economist Podcasts+, please visit our FAQs page or watch our video explaining how to link your account. Hosted on Acast. See acast.com/privacy for more information.

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“What did the council decide on item 42?” — answered with the speaker and the moment.