Contrary to some hypotheses, the organelles did not descend from any known lineage of Alphaproteobacteria, researchers find.

A new study reports which types of corals make the most of the sunlight they receive. 

Spotted salamander (Ambystoma maculatum) embryos are tinted green by the oxygen-producing algae (Oophila amblystomatis) that grow inside.

Did endosymbiosis—and the innovations in membrane bioenergetics it engendered—make it possible for eukaryotic life to evolve?

In Chapter 7, “Green Evolution, Green Revolution,” author John Archibald describes how endosymbiosis helped color the Earth in a verdant hue.

Meet some of the people featured in the December 2014 issue of The Scientist.

What researchers are learning as they sequence, map, and decode species’ genomes

A chance encounter with a crab apple tree leads to the discovery of a new bacterial species and clues to the evolution of insect endosymbionts.

How plastid genetic information survived (or didn’t) the endosymbiotic experience