Something written in every biology textbook of the past 70 years may need a rewrite. Not because the science was careless, or ...

The mystery of life’s beginnings has long captivated scientists. Central to that search is LUCA—the last universal common ancestor. LUCA sits at the root of the evolutionary tree, where two great ...

Imagine the tree of life. The tip of every branch represents one species, and if you follow any two branches back through time, you'll hit an... Life as we know it descended from a single cell. What ...

Ancient evidence suggests a new twist in how we all got here.