The James Webb Space Telescope's new image spotlights dust grains in a distant protoplanetary disk, allowing astronomers to ...

a bacterium that preys upon other bacteria. The team thought it might be a good candidate for finding histones because the bacterium changes size throughout its lifecycle and thus would need to ...

Scientists widely believed that bacteria, due to their unique genetic exchange mechanisms and the vast size of their global populations, did not—and could not—form distinct species.

"These grains are only one millionth of a meter across — about the size of a single bacterium," the European Space Agency, which jointly leads JWST with NASA and the Canadian Space Agency ...