91热爆

The communications revolution

A look at the evolution of the radio

• 26 mins

Communication hardware

The communication hardware used to connect the world

• 26 mins

Rebuilding New Orleans

A visit to New Orleans to see how the city is rebuilding its flood defences

• 26 mins

Citizen Scientists

Sue Nelson joins the armies of volunteers who call themselves Citizen Scientists

• 25 mins

Amateur astronomists

The important role of the worldwide army of amateur astronomers

• 25 mins

Counting creatures in Kazakhstan

The deserts of southern Kazakhstan support a surprising amount of life

• 26 mins

Africa's Elephants In Crisis

Episode 1

Andrew Luck-Baker travels to Kenya to see how the wildlife service is fighting the illegal culling of elephants.

• 26 mins

Africa's Elephants In Crisis

Episode 2

Andrew Luck-Baker travels to Kenya to see how the wildlife service is fighting the illegal culling of elephants.

• 26 mins

The Naming Of Genes

Genes have cryptic names. The clue to what they do lies in their names. Sue Broom looks at this game of scientific oneupmanship.

• 26 mins

Numbers That Made The World

Episode 1

Number theorist Cecil Balmond takes the listener on a journey that delves into the history of numbers and numbering systems.

• 26 mins

Numbers That Made The World

Episode 2

Number theorist Cecil Balmond takes the listener on a journey that delves into the history of numbers and numbering systems.

• 26 mins

Numbers That Made The World

Episode 3

Number theorist Cecil Balmond takes the listener on a journey that delves into the history of numbers and numbering systems.

• 26 mins

Chips With Everything

The world's supply of silicon chips relies on a mining town in North Carolina. Sue Nelson looks at the industry in Spruce Pine.

• 26 mins

Trading Up

Episode 1

'Trade not aid' is a new mantra for development but can people stay out of poverty when they trade up? Susie Emmett finds out.

• 26 mins

Trading Up

Episode 2

'Trade not aid' is a new mantra for development but can people stay out of poverty when they trade up? Susie Emmett finds out.

• 26 mins

Nuclear Fusion

Gareth Mitchell investigates whether scientists are any closer to solving our energy crisis with nuclear fusion.

• 26 mins

Synthetic Biology

Richard Hollingham reports on synthetic biology, a new science whose supporters hope will help redesign biological systems.

• 26 mins

East Germany - Carl Zeiss - A State Within A State

The story of German partition and reunification through one of the country's most prestigious companies, Carl Zeiss.

• 26 mins

Czech Republic - The Story of Semtex

The story of Semtex, a Czech plastic explosive that took centre stage in the military struggle between East and West.

• 26 mins

Romania - A Scientific View Of Agriculture

This programme tells the story of Romanian agriculture, through communist collectivisation to reform after the revolution.

• 26 mins

What Scientists Believe

Episode 1

Stephen Webster speaks to six scientists about the links between scientists' beliefs and their scientific research.

• 26 mins

What Scientists Believe

Episode 2

Stephen Webster speaks to six scientists about the links between scientists' beliefs and their scientific research.

• 26 mins