Ralph Lewis | May 24, 1992 | 1 min read
I was delighted to read the article on evolution in the March 30, 1992, issue of The Scientist ("Evolution: It's Not Just A Single Theory, It's A Lot Of Theories," page 15). Since 1980 I have been saying what was said in the headline of the article (Perspectives in Biology and Medicine, 23:551-72, 1980; The American Biology Teacher, 48[6]:344-7, 1986). There are also systems of theories in ecology, in molecular biology, and in all parts of biology. But would you learn this from reading the te