Helen Sharman, the first British astronaut (2016)

Helen Sharman talks to Jim Al-Khalili about the ups and downs of being in space.

• 28 mins

Carolyn Roberts on flood control

Environmental scientist Carolyn Roberts talks to Jim al-Khalili about floods and forensics

• 28 mins

Lawrence Krauss on dark energy

Author and cosmologist Lawrence Krauss discusses dark energy with Jim Al-Khalili.

• 28 mins

Marcus du Sautoy on mathematics

Marcus Du Sautoy shares his passion for mathematics with Jim Al-Khalili.

• 28 mins

Sheila Rowan on gravitational waves

Sheila Rowan talks to Jim Al-Khalili about her role in the search for gravitational waves.

• 28 mins

Nick Davies on cuckoos

The battle between cuckoos and warblers, as told by Nick Davies to Jim Al-Khalili.

• 28 mins

Hazel Rymer on volcanoes

Hazel Rymer talks volcanoes with Jim Al-Khalili.

• 28 mins

Faraneh Vargha-Khadem on memory

Faraneh Vargha-Khadem talks to Jim Al-Khalili about how memories are made.

• 28 mins

Georgina Mace on threatened species

Georgina Mace talks to Jim Al-Khalili about her Red List of Threatened Species.

• 28 mins

Trevor Cox on sound

Acoustic engineer Trevor Cox discusses the science of sound with Jim Al-Khalili.

• 28 mins

Frans de Waal on chimpanzees

Frans de Waal tells Jim Al-Khalili why we should expect chimpanzees to be clever.

• 28 mins

Ian Wilmut on Dolly the sheep

Jim Al-Khalili talks cloning with the creator of Dolly the sheep, Ian Wilmut.

• 28 mins

Lynne Boddy on Fungi

Lynne Boddy enthuses about fungi.

• 28 mins

Roger Penrose on black holes

Sir Roger Penrose talks to Jim Al-Khalili about black holes and flaws in quantum physics.

• 28 mins

Julia Higgins on polymers

Professor Dame Julia Higgins shares her passion for polymers with Jim Al-Khalili.

• 28 mins

Richard Morris on how we know where we are

Neuroscientist Richard Morris explains how brain cells remember.

• 28 mins

Neil de Grasse Tyson on Pluto

US science superstar, Neil de Grasse Tyson describes why Pluto isn't a planet.

• 28 mins

Michele Dougherty on Saturn

Michele Dougherty tells Jim Al-Khalili why she diverted the Cassini mission to Saturn.

• 28 mins

Jan Zalasiewicz on the Age of Man

Geologist Jan Zalasiewicz talks to Jim Al-Khalili about the Anthropocene, the Age of Man.

• 28 mins

Sadaf Farooqi on what makes us fat

Sadaf Farooqi describes how she found ten rare genetic disorders that cause obesity.

• 28 mins

Alison Smith on algae

Professor Alison Smith talks to Jim Al-Khalili about the many and varied uses of algae.

• 28 mins

Sean Carroll on how time and space began

Sean Carroll tells Jim why he abandoned Einstein for quantum entanglement.

• 28 mins

Simon Wessely on unexplained medical syndromes

Simon Wessely on medically unexplained symptoms and syndromes.

• 28 mins

Alan Winfield on robot ethics

Alan Winfield talks to Jim Al-Khalili about the ethics of robots, from drones to androids.

• 28 mins

Alison Woollard on what she has learnt from mutant worms

Geneticist Alison Wollard explains her enthusiasm for a tiny nematode worm.

• 28 mins

Daniel Dennett on the evolution of the human brain

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

• 28 mins

Nick Fraser on Triassic reptiles

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

• 28 mins

Liz Sockett on friendly killer bacteria

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

• 28 mins

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.

• 28 mins

Ann Clarke on The Frozen Ark

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

• 28 mins