The Nature of Things

Twins - And Then There Were Two (22x6)

: 18, 1981

This is a special edition based on two half hour programs that first aired in 1978. Producer Heather Cook has revised and updated the original programs to include the latest research data in studies that have been continuing over long periods at various medical centres and universities in North America. The program explains how cells divide to produce twins and the differences between fraternal twins and identical twins.