Talk by Peter Bell
"Biologists," says Mr. Bell, "often find that problems of evolution on which, on the face of it, look perfectly simple, have a way of turning out to be extraordinarily complicated." He describes one such complication he has studied in South America — the evolutionary problem presented by certain tropical trees and shrubs with which ants are always found associated.
The speaker is a Lecturer in Botany a University College, London.
(The recorded broadcast of Aug. 18)