Lisa Allardice introduces the Guardian’s forthcoming series of short stories podcasts

Adrian Searle takes a walk across Chinese artist Ai Weiwei's latest installation at Tate Modern: 100 million porcelain sunflower seeds, each painstakingly handmade. A journey across a summer beach, or an expedition across a frozen desert?

In the latest instalment of his audio series, our art critic guides you around the 'knockout' new space – a historic gallery that has been completely overhauled, and filled with specially commissioned works by artists including Fiona Banner and Paul Morrison

Where can you see a mangled jet, writhing orgy and Afghan space station all in one place? At a new art exhibition at London's Gagosian Gallery, where an eye-popping collision of sex and technology pays homage to JG Ballard's dystopian vision. Adrian Searle gives us a guided tourIn pictures: See images from the show here

In the last podcast from the 2009 Cambridge Festival of Ideas, we ask if a new morality is needed in the new world order of the 21st century

In this latest talk from the 2009 Cambridge Festival of Ideas, we ask what is holding back social mobility in the UK

At the 2009 Cambridge Festival of Ideas, David Starkey gives the first Mark Pigott Lecture, on Henry VIII and his legacy

Why has a veteran Californian artist arranged for a beautiful woman and her poodle to share an ear-shaped sofa? Fantasy has never seemed so real at the Sprüth Magers gallery in London, finds Adrian Searle

Dr Jude Browne presents a panel discussion on the cultural significance of Barbie, at the 2009 Cambridge Festival of Ideas

Professor Willie Brown and a panel of experts discuss the legacy of the recession at the 2009 Cambridge Festival of Ideas