But single-celled organisms have stuck together or assembled to spawn multicellular descendants more than two dozen times, suggesting that maybe it’s not such a big leap after all. 1 “These genes that ...

The origin of organisms with complex cells, known as eukaryotes, is one of the most crucial parts of life’s evolutionary story. All animals, plants, and fungi are eukaryotes, and if complex ...

But scientists have found that a more complex organism — a single-celled alga with a nucleus — can do it, too, thanks to a newly identified piece of cellular architecture. They're calling it ...

Who were our earliest ancestors? The answer could lie in a special group of single-celled organisms with a cytoskeleton similar to that of complex organisms, such as animals and plants. Ten years ...

such as organisms' altering of Earth's atmospheric chemistry. Yet life often bounces back. In fact, in the long term, life on Earth has trended toward increasingly complex forms and ecological ...