Chemists make breakthrough in drug discovery chemistry Two methods to replace carbon with a nitrogen atom in a molecule Physorg

The crew of a NASA mission to Mars emerged from their craft after a yearlong voyage that never left Earth.

Beams of light that can be guided into corkscrew-like shapes called optical vortices are used today in a range of applications. Pushing the limits of structured light, Harvard applied physicists…

Around two million years ago, Earth was a very different place, with our early human ancestors living alongside saber-toothed tigers, mastodons, and enormous rodents. And, depending on where they were,…