In Okinawa, Japan, scientists have created an incubating system that replicates a mother shark's womb, where they can move unborn sharks whose mothers have been killed accidentally in fishing nets.

This is an extract from an episode of Asia, a seven-part series presented by Sir David Attenborough and dedicated to our planet's greatest continent, revealing its most remarkable landscapes and animals.

Watch the full programme streaming on AMC+.

52 minutes ago