A blender is an indispensable tool in the kitchen. It purées vegetables into soup, crushes nuts into butter, whirs dressings and sauces into silky emulsifications, chops ingredients into salsas, and, ...

German physician Paul Ehrlich once famously described his quest for disease-fighting drugs as the search for a “magic bullet” that would kill germs without harming the people they infect. Ehrlich, who ...