Accessibility links

Skip to content
Accessibility Help

Home
News
Sport
Weather
iPlayer
Sounds
Bitesize
CBeebies
CBBC
Food

Home
News
Sport
Business
Technology
Health
Culture
Arts
Travel
Earth
Audio
Video
Live

Home
News
Sport
Weather
iPlayer
Sounds
Bitesize
CBeebies
CBBC
Food

Home
News
Sport
Business
Technology
Health
Culture
Arts
Travel
Earth
Audio
Video
Live

BBC Sounds

Sounds home page

Home
Music
Podcasts
My Sounds

Episode details

World Service,26 mins

Bioprecipitation

Cymraeg
Gaeilge
Gàidhlig

BBC Sounds Help
Contacts, Privacy and Information
Help with Signing In
Newsletter

Explore the BBC

Home
News
Sport
Weather
iPlayer
Sounds
Bitesize
CBeebies
CBBC
Food

Home
News
Sport
Business
Technology
Health
Culture
Arts
Travel
Earth
Audio
Video
Live

Terms of Use
About the BBC
Privacy Policy
Privacy Policy
Cookies
Cookies
Accessibility Help
Parental Guidance
Contact the BBC
Make an editorial complaint
BBC emails for you
Advertise with us

Copyright © 2026 BBC. The BBC is not responsible for the content of external sites. Read about our approach to external linking.