Endosymbioses have dramatically altered eukaryotic life, but are thought to have negligibly affected prokaryotic evolution. Here, by analysing the flows of protein families, I present evidence that ...

Until recently, the maturation of the 3′-end of tRNA precursors in Bacteria has been assumed to follow the E. coli paradigm, in which a cleavage event downstream of tRNAs is followed by exonucleolytic ...

A new study challenges a popular scenario put forward to explain the arrival of the first eukaryotic organisms. In the beginning, there was boredom. Following the emergence of cellular life on earth, ...