In a nutshell All modern humans share DNA from two ancient populations that split 1.5 million years ago and reunited through ...

Modern humans descended from not one, but at least two ancestral populations that drifted apart and later reconnected, long before modern humans spread across the globe.

More than 1,000 chemists, biologists and other scientists could be laid off under a plan to dismantle the Office of Research and Development. By Lisa Friedman Nonprofit groups have sued the ...