Liz finds out about the genetically modified papaya crops in Hawaii.
The Shepard Tone audio illusion
Dr Yan and music expert Dr Robert Samuels listen carefully to a strange sound illusion called the Shepard Tone. Find out why it makes us all hear things that aren't happening.Watch, listen and learn: Dr Yan investigates the Shepard Tone
The glamour of television - Dallas films at a farm for an item on hygiene.
- Dallas Campbell
- Liz Bonnin
- Jem Stansfield
- Series Producer
- Paul King
Available on: DVD
From suppliers including: The Hut, Zavvi