Research News Do jumping genes make evolutionary leaps? + See all authors and affiliations Science 07 Aug 1981:Vol. 213, Issue 4508, pp. 634-636DOI: 10.1126/science.7256261 R LewinFind this author on Google Scholar Find this author on PubMed Search for this author on this site Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears below.