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Prison Voicemail: Messages from behind bars

Prisoners and their families are keeping in touch with the Prison Voicemail app

• 23 mins

The tech doctors forecasting heart failure

Implanted devices can predict when something is about to go wrong with a patient鈥檚 heart

• 23 mins

Keeping data forever

Three radical new ways to save data 鈥� in DNA, glass and magnets

• 23 mins

A happier planet

Looking for the happiest places in the world and finding out what makes them happy

• 23 mins

Smartphones saving the rainforest

Old mobile phones are being used to catch illegal loggers in the rainforest

• 23 mins

How to prevent drowning

AI to help lifeguards in Israel and weather forecasts for fishermen on Lake Victoria

• 23 mins

Getting rid of AI bias

Better facial recognition and changing algorithms - how to fight racial bias in AI

• 23 mins

Training police to patrol each other

US police are being taught what to do if they're worried about a colleague鈥檚 actions

• 23 mins

How jellyfish can help us

Jellyfish could be used to filter microplastics from water and develop new medicines

• 23 mins

How to put the internet in a box

Inside the 鈥渟neakernet鈥� - the people carrying websites to places that are off the grid

• 23 mins

Saving Cape Cod鈥檚 dolphins

Saving dolphins from stranding on beaches - we meet the team improving survival rates

• 23 mins

Teenage inventor special

Brilliant ideas from school kids to help solve crime, make life safer and much more

• 23 mins

Audience takeover: Your questions answered

Answers to your questions about regrowing the rainforest and other stories we鈥檝e covered

• 23 mins

From prison to star employee

Why former criminals are being chosen for jobs at hundreds of companies in a small US city

• 23 mins

Riding the solar railway

How to make train journeys greener using the power of the sun

• 23 mins

Perovskites: The future of solar?

A new kind of solar cell is made by drying a special liquid on a surface

• 23 mins

Building with fungi

Growing packaging, coffins and whole houses out of eco-friendly mycelium

• 23 mins

Making meat in a lab

How meat grown in labs could reduce our environmental impact

• 23 mins

Saving mums and their unborn babies

Women in Nigeria have come up with an emergency transport scheme that is saving lives

• 23 mins

What happened next to our problem solvers

Hydrating sweets for the elderly go on sale and how a housing experiment coped with Covid

• 23 mins

Can doughnuts save the planet?

Doughnut economics in action - how we can live well and save the planet at the same time

• 23 mins

The solutions whisperer

Dhruv Boruah鈥檚 mission is to inspire other people to solve problems facing the planet

• 23 mins

A forest down your street

The tiny urban forests bringing nature to the heart of the city

• 23 mins

The spacesuits saving mothers鈥� lives

Suits originally designed for astronauts are helping midwives save lives

• 23 mins

How to store power in soil and salt

Batteries made of building blocks and volcanic rock

• 23 mins

Beating superbugs

The small team of Indian scientists who think they鈥檝e found a new way to kill superbugs

• 23 mins

Tackling sport鈥檚 concussion problem

How the latest technology is helping to tackle head injuries in sport

• 23 mins

The secret to making your stuff last longer

Clever ways to persuade people to fix old things instead of throwing them away

• 23 mins

The magic greenhouse

A greenhouse powered by the wind has made it possible to grow crops on arid land

• 23 mins

Using satellite photos to help distribute cash

Togo has found a new way to send emergency cash to people struggling in the pandemic

• 23 mins