Our physics expert picks his top-five equations, plus a scheme to supply US power needs with a bucket of baseballs. Thanks, ...

All in all, it's an outstanding time to be working in quantum physics. Those year-end lists have more examples of exciting developments in physics relating to materials and medicine and energy.

What is quantum physics? Put simply ... an insulator or a semiconductor, for example – things get even more complex. The billions upon billions of interactions in these crowded environments ...