US approves experimental brain implant study on humans

Elon Musk's brain chip firm has got approval to conduct its first tests on humans - we hear from a leading neuroscientist.

As the United States sanctions the leader of Wagner's operation in Mali, we look at how powerful the leaders of the Russian mercenary group have become.

And we'll find out why a race to climb the world's highest peak, Mount Everest, has become controversial.