Last summer, in a Harvard robotics laboratory, an insect took flight. Half the size of a paper clip, weighing less than a tenth of a gram, it leapt a few inches, hovered for a moment on fragile, ...

(Nanowerk Spotlight) Vaccination has resulted in the eradication of smallpox and control of measles, rubella, tetanus, diphtheria, and other infectious diseases in many areas of the world (at least ...