We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitlePhylogenetic classification and the universal tree.AuthorsDoolittle WFPublicationScience (New York, N.Y.), 1999, Vol 284, Issue 5423, p2124ISSN0036-8075Publication typearticleDOI10.1126/science.284.5423.2124