Finally, the three-domain structure of Woese's tree (Figure 1a) shows that evolutionary history is decoupled from biological organization. Indeed, archaea and bacteria appear very similar ...

The origins of life on Earth have long fascinated scientists, particularly the nature of the last universal common ancestor ...

However, despite this vast, disparate tree of life, every living thing falls into one of three large categories, or “domains”—archaea, bacteria, and eukarya. All of the usual stuff we think ...