Imagine Max, a well-trained border collie, manages to ignore a squirrel in the park when his owner tells him to sit. His owner says, "Max, stop chasing that squirrel and sit down," and Max obeys. Can ...

It’s the same math that explains how, under the right conditions, the atmosphere above a barren plain can produce a roiling tornado. Merle has had enormous success taming these blowups in the ...

Efforts to use the tech to customize lessons to students' individual interest demonstrate its potential—and the shortcomings.