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Tamsin Mather on what volcanic plumes reveal about our planet
Tamsin Mather explains what volcanic plumes tell us about our planet, past and present.

Tim O'Brien on transient stars and science and music festivals
Jim Al-Khalili talks transient stars and music festivals with Tim O'Brien of Jodrell Bank.

Ottoline Leyser on how plants decide what to do
Ottoline Leyser talks to Jim Al-Khalili about how plants decide to grow the way they do.

Fay Dowker on a new theory of space-time
Fay Dowker and Jim Al-Khalili discuss the texture of space-time.

Ann Clarke on The Frozen Ark
Jim Al-Khalili talks to Dr Ann Clarke about preserving global animal DNA in The Frozen Ark

Graham MacGregor on tackling the demons in our diet
Jim Al-Khalili talks to Prof Graham MacGregor about his remarkable war on sugar and salt.

Liz Sockett on friendly killer bacteria
Jim Al-khalili talks to Professor Liz Sockett about the evil genius of predatory bacteria.

Nick Fraser on Triassic reptiles
Nick Fraser tells Jim Al-Khalili about some extraordinary fossil finds.

Daniel Dennett on the evolution of the human brain
Daniel Dennett talks to Jim Al-Khalili about the evolution of the human brain.

Alison Woollard on what she has learnt from mutant worms
Geneticist Alison Wollard explains her enthusiasm for a tiny nematode worm.