(B) The rooted three-domain tree. (C) The network of life. A: archaea; B: bacteria; E: eukaryote; LUCA: last universal common ancestor of cellular life-forms. The question mark indicates the ...

of all cellular life really existed, although we still know little about what this ancestor was like and how it lived. Finally, the three-domain structure of Woese's tree (Figure 1a) shows that ...

Scientists have debated where Prototaxites belong in the tree of life for over a century, but now a new study suggests it ...

Ten years ago, nobody knew that Asgard archaea even existed. In 2015, however, researchers examining deep-sea sediments ...

Who were our earliest ancestors? The answer could lie in a special group of single-celled organisms with a cytoskeleton similar to that of complex organisms, such as animals and plants.

ETH researchers discovered related structures in Asgard archaea and describe their structure. These experiments show that ...