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ScienceWeekly is supported by the Wandery Podcast, Where in the World. Dive into the latest scientific discoveries, innovations and stories guaranteed to make everyone say wow. Did you know that one bat poop is cube-shaped? Or that the centre of the universe smells like raspberries? Hosts Mindy Thomas and Guy Raz share the latest scientific innovations and discoveries with the occasional fart joke. Listen to brand new episodes of the number one podcast for curious kids and their grown-ups wherever you get your podcasts.

At a recent conference in France, scientists and government representatives voted to scrap the leap second by 2035. Leap seconds are added periodically to synchronise atomic time and astronomical time, which get out of sync because of variations in the Earth’s rotation. Madeleine Finlay speaks to JT Janssen, the chief scientist at NPL, the National Physical Laboratory, about the differences between these two times, and what can go wrong when leap seconds are added to our clocks. Help support our independent journalism at theguardian.com/sciencepod