Prokaryotic single-celled organisms, the ancestors of modern-day bacteria and archaea, are the most ancient form of life on our planet, first appearing roughly 3.5 billion years ago. The first ...

For billions of years after the origin of life, the only living things on Earth were tiny, primitive cells resembling today’s bacteria. But then, more than 1.5 billion years ago, something remarkable ...

The sun has just set on a quiet mudflat in Australia’s Northern Territory; it’ll set again in another 19 hours. A young moon looms large over the desolate landscape. No animals scurry in the waning ...

LUCA, the 'last universal common ancestor' of all living organisms, lived 4.32 to at most 4.52 billion years ago. What LUCA looked like is unknown, but it must have been a cell with among others ...

All cells in animals, plants, fungi, and protists share a fundamental characteristic, in that they are eukaryotic cells. These are essentially complex cells with specialized internal compartments. The ...

Prokaryotes are ancient, simple forms of life that include bacteria and archaea. These cellular life forms lack membrane-bound organelles. Those organelles, which include the nucleus and the ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? “The discovery of S. arienae broadens our understanding of early eukaryotic evolution ...

Chondromyes crocatus, a species of myxobacteria, forms multicellular fruiting bodies during its life cycle. Credit: Grilione P.L. & Pangborn J./Journal of Bacteriology, 1975 Prokaryotic single-celled ...

A schematic tree of life with the primary domains, the Archaea and Bacteria shown in purple and blue, respectively and the secondary domain, Eukaryotes in green. The figure highlights key nodes in the ...