Is the deep ocean the answer to some of our biggest problems?

Humanity has many problems. Does the solution to some lie deep beneath our oceans' waves?

• 23 mins

How can Chennai’s water crisis be solved?

South India’s biggest city is gripped by drought, residents have to queue for water.

• 23 mins

What kind of Prime Minister would Boris Johnson make?

Examining the character, beliefs and ambition of Britain’s most recognisable politician

• 24 mins

Will China crack down on Hong Kong?

Last month Hong Kong witnessed its largest ever protests. How will China respond?

• 22 mins

Can you reduce Central American migration?

More and more families from Guatemala, Honduras and El Salvador are travelling to the US

• 24 mins

Do children in two-parent families do better?

We investigate the research into growing up with married, cohabiting and single parents.

• 24 mins

Is Germany OK?

It’s known for precision and punctuality but Europe’s engine is slowing down.

• 22 mins

Why are we having less sex?

Porn, smart phones and the ‘slutty transmitter’

• 23 mins

Why does Donald Trump seem to have such a problem with the truth?

Examining some of the many false or misleading claims made by the US President

• 22 mins

Why the race to build a quantum computer?

Corporations are spending billions to turn quantum computers into workable technology.

• 23 mins

Is rock music doomed?

Bruce Springsteen is turning 70; rock’s gods are getting on. Who can replace them?

• 23 mins

How can we save our forests?

This summer fires in the Amazon rainforest caught the world's attention.

• 24 mins

Is Africa facing another debt crisis?

A risky mix of easy credit and easy spending

• 24 mins

Are we heading for a global recession?

Trade wars and Europe’s slowing growth. Is an economic downturn inevitable?

• 22 mins

Can we dismiss QAnon?

The far right conspiracy theory featuring child molestors and baby eaters.

• 23 mins

Is vaping safe?

After deaths in the US and bans around the world, how risky are e-cigarettes?

• 23 mins

Why are the Kurds always in the firing line?

Kurdish people have been caught up in dozens of conflicts. Why can’t they find peace?

• 24 mins

How soon can we go carbon zero?

To stop global warming, we need to cut CO2 emissions. So how soon can we go carbon zero?

• 23 mins

Why are immigrants under attack in South Africa?

In the so-called “rainbow nation”, why are foreigners so often subject to violence?

• 24 mins

What can we do about the world’s mental health problem?

The World’s mental health is suffering so what can we do about it?

• 23 mins

Why is there a backlash against climate policies?

A year on from the “gilets jaunes” protests, are environmental policies in trouble?

• 24 mins

Can we protect our elections from social media manipulators?

Who can you trust in the world behind the screen?

• 23 mins

Should we ban billionaires?

Should extreme wealth and the system that enables billionaires to retain money be curbed?

• 23 mins

Is Nato obsolete?

With the US and French presidents questioning its future, Nato is in crisis

• 23 mins

Can we eradicate polio?

Despite heroic efforts to vaccinate against this crippling disease, why does it persist?

• 23 mins

Will humans become extinct by the end of the century?

How precarious is our civilisation and what can be done to stop a global catastrophe?

• 23 mins

Why was Qasem Soleimani killed?

How serious an enemy to the US was Qasem Soleimani, and why was he killed?

• 22 mins

Why does Ukraine have such a corruption problem?

How did Ukraine’s chequered past lead to the impeachment of president Trump?

• 24 mins

How did Trump get into trouble with Ukraine?

How did Trump’s personality and way of dealing with people lead to a trial in the Senate?

• 23 mins

Is recycling broken?

Were we wrong to think that recycling was the answer to our waste problem?

• 23 mins