I like," said Emerson, "dry light, and hard clouds, hard expressions, and hard manners." The writers who become our saints and sages, the wise men of our tribe, they who help us to live—there is ...

The hard X-ray FEL has come of age. A free-electron laser is not like other lasers. It works by forcing a beam of electrons, travelling at nearly the speed of light, to oscillate in a long ...