Add Yahoo as a preferred source to see more of our stories on Google. Quantum mechanics is both the most powerful theory physicists have ever devised and the most baffling. On the one hand, countless ...

Once a baffling theory, quantum mechanics has evolved into a driving force behind modern technology and frontier research.

At the smallest scales of nature, the rules of the world shift in ways that can feel unsettling and beautiful at the same time. Matter no longer behaves like solid objects moving along clear paths.

Positronium shouldn't last long enough to be interesting. It's an "atom" assembled from an electron and its antimatter twin — ...

A ball tossed into the air follows a path that classical physics can track with confidence. Shrink that ball down to the size ...

The relationship between physical theory and biological organization remains one of the most challenging in contemporary science. Part of the inspiration of ...