Richard Lenski is best known for his 20-year ''E. coli'' experiment in which he claims to have obtained proof of [[evolution]]. Lenski claims that he observed minor changes in bacteria populations in the long-term laboratory study, while insisting that these changes were not due to contamination. | Richard Lenski is best known for his 20-year ''E. coli'' experiment in which he claims to have obtained proof of [[evolution]]. Lenski claims that he observed minor changes in bacteria populations in the long-term laboratory study, while insisting that these changes were not due to contamination. |