This week, why stress makes mice turn grey, and how to think about climate change.

In this episode:

00:45 Going grey

Anecdotal evidence has long suggested stressas a cause of grey hair. Now, a team of researchers have showed experimental evidence to suggest this is the case. Research Article: Zhang et al.; News & Views: How the stress of fight or flight turns hair white

08:39 Research Highlights

Ancient bones suggest that giant ground sloths moved in herds,plus an atomic way to check for whiskey fakes. Research Highlight: A bone bed reveals mass death of herd of giant ground sloths; Research Highlight: Nuclear-bomb carbon unmasks fraudulent luxury whisky

10:40 Climate optimism

To tackle climate change, the former UN secretary for climate change argues that the biggest change needs to be mindset. Comment: Paris taught me how to do what is necessary to combat climate change

18:09 News Chat

The latest on a new virus from Wuhan in China, and insights from ancient African genomes. News: China virus latest: first US case confirmed; Research Article: Lipson et al.

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23 January: How stress can cause grey hair, and the attitude needed to tackle climate change

Nature Podcast