Series:

Thumbnail	Title	Series Number	Date	Description
	Natural selection		1971	Dr. Manton is a cat breeder and she explains the process of artificial selection starting with a...
	Evolution by natural selection		1972	A knowledge of genetics is of tremendous importance to anyone who breeds animals or plants and that...
			06 June 1971
	Species and populations		1971
			21 June 1971
	Unity and diversity		1971	The evolution of the skeleton from snake to primate is discussed The differences in motion and how...
	The nature of P and S waves		1971	A physical demonstration of the nature of P and S waves is followed by a discussion and...
			28 June 1971
			S100_1971X_BX_V022.avi