JERUSALEM, Jan. 21 (Xinhua) -- Researchers have identified ancient proteins that may help explain how the first complex cells evolved from simpler ones over 1.5 billion years ago, Israel's Ben-Gurion ...

Asgard archaea form a group with the eukaryotes in the tree of life. May only be published in connection to reports about the research described in this press release.

The ancestor of plants, animals and fungi evolved around 2 billion years ago, likely from a group of complex microbes called Asgard archaea — and we inherited two defense proteins that fight off ...

Scientists have yet to determine precisely how novel archaea should be classified. Also in dispute is how Eukarya fit into the picture—some scientists suggest they’re an offshoot of a branch known as ...