Scientists are using molecular clocks and genomic data to trace the origins of LUCA and LECA—life’s earliest common ancestors ...

Existing bacteria and archaea still our universal common ancestor’s ribosomal hibernation defense mechanism when nutrients ...

Deep in some of Earth’s oldest rocks, traces of ancient life still linger, even when every cell has crumbled. You would not see shells, bones, or clear microfossils in these rocks. Instead, you would ...

Scientists now believe the earliest plants were not leafy or rooted, but microscopic green algae drifting in oceans roughly ...