Scientists assumed most forms of life before the Great Oxidation Event didn't metabolize oxygen—but recent research suggests ...

Thus, understanding the evolutionary history of living species amounts to understanding where on the tree of life these species' distinctive traits arose. Moreover, phylogenetic trees serve as ...

The resulting weighted parsimony tree has the same topology as the ... many diverse and currently distantly related groups of bacteria. Phylogenetic analysis of combined protein data sets ...

“This should have a major effect on textbook treatment of these subjects.” Since the late 1980s, all life forms have been split into three groups on the phylogenetic tree of life: bacteria, archaea, ...