You Can Hear a Leaf....
What sound does a leaf make when you deprive it of water? Today you can hear that sound, as recorded by botanists at the University of Glasgow. They'll also be telling us how a bean knows which way is up - and is there really such a thing as ' green fingers '?
Introduced by MAGNUS MAGNUSSON Producer CHARLES NAIRN (BBC Scotland)
(Repeated: Wednesday 9.5 am)