The Archaea was recognized as a third domain of life 40 years ago. In this Review, Emeet al. outline a brief history of the changing shape of the tree of life and examine how the recent discovery ...

Archaea and bacteria are two different domains of cellular life. They are both prokaryotes, as they are unicellular and lack a nucleus. They also look similar (even under a microscope). However ...

Prokaryotes are organisms whose cells lack a nucleus and other organelles. Prokaryotes are divided into two distinct groups: the bacteria and the archaea, which scientists believe have unique ...

Prokaryotes were the first form of life, scientists believe that eukaryotes evolved from prokaryotes around 2.7 billion years ago. 1. Current doctrines on the origins of eukaryotes state that two ...

A decade ago, the existence of Asgard archaea was unknown. However, in 2015, researchers analyzing deep-sea sediments uncovered gene fragments that suggested the presence of a new, previously ...

Prokaryotes were the first form of life, scientists believe that eukaryotes evolved from prokaryotes around 2.7 billion years ago. 1. Current doctrines on the origins of eukaryotes state that two ...

In 2015, researchers examining deep-sea sediments near the underwater volcano Loki discovered gene fragments indicating a new ...

Because they rely on hosts for a majority of functions, viruses aren’t considered alive. But entities like ‘Sukunaarchaeum ...

Arrival of the Asgards. After receiving her PhD in 2013, evolutionary microbiologist Anja Spang was shopping around for a postdoc. For her dissertation, Spang had studied a group of archaea called the ...

Prokaryotes are the group of organisms including bacteria and archaea that do not have a membrane-bound nucleus and instead have a circular, double-stranded molecule of DNA called a nucleoid, that ...