Astronomer Stuart Clark joins us in the studio to look at the latest thinking about the effects of variations in solar activity on the Earth's climate. Dark matter gets a mention too.

Over the coming days he will be conducting question-and-answer sessions on Twitter - both on solar activity and dark matter. Follow him at DrStuClark and post your questions using the prefix #AskDrStu. (2:00)

There's a new BBC TV series starting this week called Paradox. Its writer Lizzy Mickery comes into the studio to tell us about the challenges of getting a drama based on science onto prime-time TV. (12:10)

In the newsjam we look at a new drug hailed as the "female viagra" and Nasa's announcement that its LCROSS probe found water on the moon. (15:30)

Duncan Clark from environmentguardian.co.uk responds to the s*** storm of blog comments arising from last week's podcast on eco-myths. Who'd have thought people could get so excited about nappies? (23:25)

Steven Levitt talks about his controversial views on geo-engineering, expressed in his latest book SuperFreakonomics. Hear more of that interview in the Guardian's The Business podcast. (26:15)

All the way from Denmark, Dr Rachel Armstrong discusses living buildings and metabolic materials. She is giving a Lunch Hour Lecture at UCL this week. (30:15)

We finish the show with more music ... the winner of Discover Magazine's "evolution in two minutes or less" video competition. (33:15)

Science correspondent Ian Sample lends us his wisdom in the pod. We promise to give it back soon.

WARNING: contains strong language.

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