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Alex Jones and Jermaine Jenas are joined by Chris Packham, who chats about his new science series Earth, which looks at some key moments in our planet's four and a half billion year history.

Also on the show, Amol Rajan tells us how it feels to be the new host of University Challenge, Doctor Chris Van Tulleken warns us about the perils of ultra-processed food, and Matt Allwright celebrates all things feline as he reports live from the Cat Awards.