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The Chase

Tracks across time

Scientists race to save a set of 95-million-year-old footprints

• 26 mins

Chemists' Dirty Secrets

From the Crimean War to the end of World War Two

Andrea Sella looks at the role chemists have played in the development of weapons

• 26 mins

Chemists' Dirty Secrets

From the Cold War to the present day

The role chemists have played in the development of chemical weapons

• 26 mins

ShakeAlertLA - California鈥檚 earthquake early warning system

The mobile app that will warn southern Californians if an earthquake is heading their way

• 26 mins

California burning

Roland Pease investigates the growing fire hazard in California

• 26 mins

Unbottling the past

The discovery and recreation of an iconic perfume formula for Soir de Paris

• 26 mins

Donna Strickland and extremely powerful lasers

Donna Strickland on inventing extremely powerful lasers and winning a Nobel Prize

• 26 mins

Ken Gabriel on why your smartphone is smart

Ken Gabriel on inventing micro devices found in smartphones

• 26 mins

Corinne Le Qu茅r茅 on carbon and climate

Corinne Le Qu茅r茅 on carbon and the global climate

• 26 mins

Carlo Rovelli on rethinking the nature of time

Theoretical physicist Carlo Rovelli on why time is not what it seems

• 26 mins

Cat Hobaiter on communication in apes

Jim al-Khalili talks chimp gestures with Dr Cat Hobaiter

• 26 mins

A sense of time

Does a second feel the same for a fly, a bird, or a swordfish, as it does for me?

• 26 mins

How do instruments make music?

1/6 Why do different musical instruments sound unique?

• 28 mins

Why people have different pain thresholds

2/6 Plus, how fast can a human run?

• 26 mins

Will we ever find alien life?

3/6 Where are we looking for alien life and what are the chances of finding it?

• 27 mins

Why do we get d茅j脿 vu?

4/6 Plus is anything really random?

• 26 mins

Does infinity exist?

Rutherford and Fry embark on a never-ending quest for infinite knowledge

• 26 mins

Why do birds sing?

6/6 And why does the human voice change as we age?

• 27 mins

Vaccination: The Global Picture

Global attitudes towards vaccines

From New York to Madagascar: attitudes to vaccines around the world

• 26 mins

Vaccination: The Global Picture

Can psychology boost vaccination rates?

Is compulsory vaccination necessary or can gentle persuasion boost immunisation rates?

• 26 mins

Paul Davies on the origin of life and the evolution of cancer

Paul Davies talks to Jim al-Khalili about the origin of life and the search for aliens.

• 26 mins

Irene Tracey on pain in the brain

Irene Tracey tells Jim Al-Khalili how imaging the brain reveals how and why we feel pain.

• 26 mins

What next for the Moon?

The Moon rush is back. And everyone is a player. Roland Pease looks at the new space race

• 26 mins

Lovelock at 100: Gaia on Gaia

James Lovelock on how he developed Gaia theory.

• 26 mins

Richard Peto

Epidemiologist Richard Peto talks about his work on the links between tobacco and disease.

• 26 mins

Erica McAlister

Dr Erica McAlister talks to Jim Al-Khalili about the beautiful world of flies.

• 26 mins

The Great Science Publishing Scandal

Matthew Cobb asks who owns research. Scientists, publishers or the public?

• 26 mins

Patient Undone

Prof Deborah Bowman reveals how a cancer diagnosis transformed her view of medical ethics

• 26 mins

The power of deceit

Lucy Cooke discovers why being a bit sneaky may be an excellent evolutionary strategy.

• 26 mins

The power of petite

Lucy Cooke discovers why being small can give you a step up on the evolutionary ladder

• 26 mins