With modern technologies unearthing novel bacterial and archaeal species by the dozens, hundreds, or even thousands, manually naming them all is no longer practical, scientists say.

The 12-year-long endeavor reveals Prometheoarchaeum as a tentacled cell, living in a symbiotic relationship with methane-producing microbes.

When different archaeal species mate, their CRISPR systems interact in ways that may influence their evolution.

Scientists estimate that subterranean organisms constitute a massive amount of carbon, 245 to 385 times greater than that contained in all humans.

What we can know about biology before the last universal common ancestor is limited—and we should be circumspect in filling in the gaps.

Meet some of the people featured in the June 2018 issue of The Scientist.

We should take comfort in the fact that life on Earth had such unassuming, shared beginnings.

The ancient organisms appear to be more closely related to eukaryotes than previously appreciated.

Identification of new archaea species elucidates the domain’s unique  biology and sheds light on its relationship to eukaryotes.

The discovery of copious new archaeal species is shedding light on the tree of life and revealing some unique cellular biology.

The paper describing the gene-editing method is retracted.

Scientists expand the microbial tree of life by publishing more than 1,000 novel reference genomes.  

Two previously overlooked archaeal strains fill an evolutionary gap for microbes.

A newly discovered superphylum of archaea may be related to a microbe that engulfed a bacterium to give rise to complex eukaryotic life.

A metagenomics analysis finds Cas9 in archaea for the first time, along with two previously unknown Cas nucleases from bacteria.

Researchers discover acetogenesis in archaea, suggesting an important role for these little-studied organisms in generating organic carbon below the seafloor.

Bathyarchaeota undergo acetogenesis, generating organic carbon below the seafloor.

Extremophiles can thrive on perchlorates and metabolize carbon monoxide, researchers report.