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The Search for Pure Water

What’s the best way to source clean water from the environment?

• 30 mins

Measuring Earthquakes

How the Richter Scale is used to measure the intensity of earthquakes

• 30 mins

Why Didn’t America Colonise Africa?

Anti-colonial and self-sufficient, the US chose not to join Europe’s scramble for Africa

• 29 mins

Drill Sergeant Commands

Techniques and drill terms from the parade ground

• 30 mins

The Monica Lewinsky Scandal

Why wasn’t US President Bill Clinton brought to trial following the Monica Lewinsky affair

• 28 mins

Where Time Begins

How space and time is measured from Greenwich Observatory in London

• 28 mins

How Far is Heaven From Hell?

Is man responsible for the decisions he makes? Special edition on religion

• 28 mins

The Trouble with Liberia

Dissecting the relationship between the US and former Liberian President Charles Taylor

• 29 mins

Nigerian Heads of State

The relationship between General Abdulsalami Abubakar and the late General Sani Abacha

• 29 mins

Spousal Rape in Nigeria

How the Nigerian legal system prevents women from reporting cases of rape

• 30 mins

The World’s Oldest Humans

How scientists identified three million-year-old human remains in South Africa

• 29 mins

Russian-American Relations

Why China and Russia regularly oppose the US in high-profile international matters

• 29 mins

Any Way The Wind Blows

How do hot air balloons avoid collisions with aeroplanes?

• 28 mins

The Exile of Pascal Lissouba

The exile of former Republic of the Congo President Pascal Lissouba

• 30 mins

Meteor or Meteorite?

Martin Redfern explains the difference between meteors and meteorites

• 30 mins

The History of Post

How the Romans inspired the modern postal service

• 30 mins

Tackling Tobacco Companies

Could African tobacco companies be prosecuted by people with smoking-related illnesses?

• 29 mins

Africa’s Violent Volcanoes

How Africa’s volcanoes are formed and what makes them erupt

• 29 mins

Preventing Air Disasters

How Heathrow Air traffic controllers prevent mid-air collisions

• 30 mins

Death Cults of Ancient Egypt

Why death was more important than life in Ancient Egypt

• 29 mins

The Wrong Target

Why NATO planes bombed the Chinese embassy in Belgrade

• 29 mins

The Balkans’ Biggest Losers?

Serbia’s national identity is rooted in the notion that its people always lose

• 29 mins

Broadcasting in FM

Postmark Africa celebrates its inaugural FM radio broadcast in Nigeria

• 29 mins

Discrimination at Work in Africa

Sexism, racism and discrimination against disabled people at work in Africa

• 13 mins

Celebrating Postmark Africa

A look back at the programme’s humble beginnings as it celebrates 40 years on the airwaves

• 29 mins

Why Boats Float

From simple logs to steam ships – what makes boats float in water?

• 28 mins

Release Your Cosmic Energy

How yoga’s lotus position can help release trapped cosmic energies

• 29 mins

Hindu Reincarnation

Can the soul of a Hindu person return as a cow?

• 29 mins

The Unknown Soldier

The origin of the term ‘unknown soldier’ and why it’s used

• 29 mins

'Planes Will Fall From the Sky'

How the millennium bug incited global panic

• 29 mins