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Already widely used in China, facial recognition payment is now expanding in other countries.

Professor Ed Copeland shows a proof by Joseph "Voldemort" Fourier that e is irrational.Check out episode sponsor http://KiwiCo.com/Numberphile for 50% off yo...

Photographer George Logan highlights the decline of wild lions using conceptual images.

Billionaires' wealth has soared while the pandemic has plunged millions into poverty, Oxfam says.

Google's Loon bows out - but thousands of satellites are taking to the skies to beam down the internet.

Scans of fossilised dinosaur remains reveal they were about 3ft long when they took their first steps.

Laboratory tests suggest antibodies can recognise and fight the UK and South Africa variants.

The actress explains why she has a "no nudity clause" written into her movie contracts.

Some people welcome face coverings for reasons ranging from the convenient and expedient to the more complex and psychological. But is this a helpful coping mechanism?

Dominion seeks $1.3bn in damages over a campaign claiming its machines switched US election votes.

It is the first time civilian victims of the highly toxic chemical will have their cases heard.

Artificial intelligence is getting better at negotiating and research promises systems that could help you.

Danish film Another Round features performances of drunkenness so convincing that it's tempting to believe the actors were tipsy themselves. Nicholas Barber finds out.

Scientists propose 10 golden rules for restoring forests to maximise benefits for the planet.

Featuring Holly Krieger... Check out Brilliant (and get 20% off their premium service): https://brilliant.org/numberphile (sponsor)More links & stuff in full...

In northern Kenya, researchers are working to prevent a dangerous coronavirus – Mers – from jumping from camels to humans again. But climate change is making their job more difficult.

Shares in a games company have soared more than 300% - the result of a fight between private and professional investors.

Farmers angry at market reforms smashed their way through police lines to march into central Delhi.

Netflix's The Dig tells the story of the Anglo-Saxon longship that was unearthed at Sutton Hoo in 1939. It was an extraordinary find in more ways than one, writes Neil Armstrong.

A phone call in the middle of the night led one Swiss lawyer to pursue Nigeria's stolen money.

A tongue-in-cheek official video urges tourists to find more original ideas for their photo poses.

Police from the UK, EU, and North America take down a notorious cyber-crime web.

Understanding how new variants of the coronavirus in Brazil, South Africa and the UK are altering the behaviour of the virus will be crucial in our vaccine arms race against Covid-19.

The rare purple was said to be worn by prestigious figures such as King David, Solomon and Jesus.