1.   These patterns and the genes that encoded them enabled him to study snail evolution -- how and why snail populations diverged from each other.

2.   Baird, a social linguist, studied the evolution of language on gravestones in family plots and found something telling.

3.   Ewald has studied the evolution of disease, challenging the usual notion that pathogens become milder as they evolve, so as not to kill off their hosts.

4.   It is a relatively new field that studies the evolution of cookery through the ages, using recipes as the primary sources.

5.   Mitochondrial DNA can be particularly useful for studying evolution because animals inherit it only from their mothers.

6.   Richard Lenski, a biologist at Michigan State University, used to study evolution by allowing bacteria to reproduce, generation after generation, in a laboratory dish.

7.   Scientists study the evolution of viruses that cause epidemics in the hope of learning how to predict and prevent such outbreaks.

8.   The Supreme Court on Monday refused to consider a case from a school board in Louisiana that wanted students to hear a disclaimer before studying evolution.

9.   Thrinaxodon liorhinus is a familiar fossil to scientists who study the evolution of mammals.

10.   Mahathir suggested the new chair in Malay studies at Victoria should study the evolution of the Malay people.