|DR. LYNN MARGULIS|
Lynn Margulis, 73; transformed view of evolution
A champion of the microorganism throughout her career, Lynn Margulis wrote about cells in ways that changed the way most scientists view evolution. Rather than embrace what is known as the belief that random mutation led to leaps forward in evolution, Dr. Margulis argued that changes are rooted in a web of new and ongoing relationships at the cellular level. Dr. Margulis, a distinguished professor at the University of Massachusetts-Amherst who was awarded the Presidential Medal of Science in 1999, died Nov. 22 in her Amherst home. She was 73.