Spin-polarized electron beams are important for fundamental physics, but they could only be generated using DC electron guns. Now, a radiofrequency electron gun for ...

How do you create an inquisitive mind? Simply accumulating knowledge isn't good enough, suggest Lei Bao and colleagues (Am. J. Phys. 77, 1118–1123; 2009). Specifically, the teaching and learning of ...

More than a century before graphene was isolated in a modern lab, Thomas Edison may have been unknowingly making the wonder ...